FOR M TP 2012 155
I·.
CAR IBBE AN
EXA MIN ATIO NS
COU NCIL
ADVA NCED PROF ICIEN CY EXAM INATI ON CHEM ISTRY - UNIT 2 Paper 01 90 minutes
( 07 JUNE 2012 (p.m.) ) READ THE FOLL OWIN G INSTR UCTIO NS CARE FULLY .
1. 2. 3.
4.
then1. This test consist s of 45 items. You will have 90 n1inutes to answer a Data Bookle t. In additio n to this test bookle t, you should have an answer sheet and (C), (D). Read each · e Each itetn in this test has four sugges ted answer s lettered (A), (B), best. is you are about to answer and decide which choice item and shade the s. On your answe'r sheet, find the numbe r which corresp onds to your sample item below. having the san1e letter as the answer you have chosen . Look at the Sampl e Iten1
···.!.
··s·
_1~
con1pound? Which of the follow ing is the HIGHEST energy transiti on in an organic (A) (B) . (C) (D)
.r
.·;
Satnple Answe r
n to a+ n ton:+
a to a* 1t
ton:*
been shaded. The best answer to this iten1 is "a to cr*", so answer space (C) has
6.
your new choice. If you want to change your answer , erase it comple tely and fill in as careful1y as you can ~f When you are told to begin, tum the page and work as quickly and to this item later. Your sc 1 . you cannot answer an iten1, go on ~o the next one. You n1ay return will be the total nmnbe r of correct answer s.
7.
You tnay do any rough work in this bookle t.
8.
Figure s are not necess arily drawn to scale.
9.
You n1ay use a silent, non-pr ogranu nable calcula tor to answer iten1s.
5.
...
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--
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-== iiiiiiiiiiil
=
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DO SO. DO NOT TURN THIS PAGE UNTIL YOU ARE TOLD TO Copyr ight© 2010 Caribb ean Examin ations Counci l All rightsr eserve d.
l I
-2-
1.
Which statement is true about C - C bonds? A double bond is made of a sigma bond and a pi bond. There is a higher electron density between the atoms in a single bond than in a double bond. The distance between the nuclei of the carbon atoms is shorter in single bonds than in double bonds. Single bonds are more reactive towards most reagents than double bonds.
(A) (B)
(C)
(D)
!
3.
The compound which shows both ci - rans isomerism and optical isomerism is H
H
"I
c
(A)
H
c /I'\
I
I I I
I
I
/
c
"I H
c
I
'\
c= c
!
c
IJ"- H
l
"
/ H
/
I
c
I
--,
/
H
H
l
I
H
I H-C-H I
H
"
c
(C)
c
H
H The IUPAC name for the structure is
(D)
I H
Cl
Cl
H
(A) (B) . (C)
'\
I
H-C-H
2.
I
H
H-C-C -C-C-H
H H
I
C- H r
H
H
I
Item 2 refers to the following structure.
H H H.
I
!
(B)
H
----,
2- ethyl butane 3 - ethyl butane 2 - methyl pentane 3 - methyl pentane
c
"/ c
/
II'- H
I
H
Br
H
H
"
c
(D)
c
"
/
c H
/j"H
H
I
H
GO ON TO THE NEXT PA ~,
I
I
-34.
I:, I:::~
l l
L
5.
Volatility of organic compound s depends on the strength of the inten11olecular forces present. Which compound below would be the MOST volatile? (A) (B) (C)
CH3 CH2 CH2 0H CH 3CH2CH2CH3 CH 3CH(CH3 )CH 3
(D)
CH3CH2CH2COOH
I.
II.
III.
l_
(A) (B) (C) (D)
Which of the following alcohols will N The oxidised by acidified potassium die mate (VI)?
(A)
~H1 0H
CH1 0H (B)
In the reaction between ethene and bron1ine, which statemen ts about the reaction mechanism are true?
I_
L
6.
I I
CH- C - H 3
OH
A carbocatio n forn1s in the rate detennini ng step. A dative covalent bond forms between the bron1ide ion and the carbocatio n. Heterolyti c fission of the brominebromine bond occurs.
H
I (C)
CH -CH - C - O H 1
3
I
CH 3
CH 3
I and II only I and III only II and III only I, II and III
(D)
I I
CH- C - OH 3
CH 3
l_ 7.
The equation for the fom1ation of the a aesthetic, CF3CHBrCl, is
l_ Br2
L l_
> CF3CHBrCl
The type of reaction occun·ing is (A) (B)
(C)
(D)
electrophilic substitution free radical substitution nuc.Ieophilic addition nucleophilic substitution
GO ON TO THE NEXT P
r
-48.
Ethanol can be fonned by the fo11owing reaction
10.
oes Which of the following compoun NOT give a white precipitate when h ken with cold ethanolic silver nitrate? (A)
The mechanism used is (A) (B)
(C) (D)
eJectrophilic addition nucleophilic addition electrophilic substitution nucleophilic substitution
Cl
(B) I i i
Iten1 9 refers to folJowing diagram of Compound A.
I
I
CJ (C)
0
I I I
II i
(D)
I I
nc==cn2 Compound A
9.
Which statements are cmTect concerning Cmnpound A?
I.
II. 111.
(A) (B) (C)
(D)
I 11.
It will decolourize aqueous bromine. It will decolourize cold, acidified potassimn pennanganate. It will produce a silv~r mirror with Toll en's reagent. I and Il only I and 11 I only II and JII only I., II and HI
Which of the foJJowing would rei proton MOST readily? (A) (B)
(C)
(D)
12.
CH 3CH 20H CH.COOH ·' C"'H 50H CH 30H
Hydrogen cyanide is more likely to ethanal but not to ethene because (A) (B)
(0)
f
a
I !
i to
I
i ethanal is more susceptible Ito e)ectrophilic attack than et ~:~i,1e ethan~ I is more susceptible t tl' jee rsd1caf
(C)
l
attack than ethene
1
ethanal is more susceptib ito nucleophilic attack than et et~e the addition product formed '- ~th ethene would be unstable
I
GO ON TO THE NEXT PA ~. I
.......
-l J~fl~J1?·''
1;1
- 5-
.
::;i~~
Jten1 13 refers to the following structure of tyrosine.
16.
I Which of the following may be elimi ~fed by calibrating a measuring instrume t I
(A) (B) (C) (D)
1\~
1
I
i I
'.:i
17 .
l !'
... ..~
·;;:J:
j·[
Lack of precision Random en-ors Systematic errors Random and systematic erro s
Which of the following is NOT apr of a prhnary standard? Does not undergo hydrolysi Has low relative molecular Is obtainable in a pure state. Is very soluble in water.
(A)
13.
The pH of tyrosine is MOST likely
(A) (B) (C) (D)
14.
2.1 5.6 7.0 9.0
(D)
18.
Which of the following is NOT true of addition poly1nerisation? (A) (B)
(C)
(D)
15.
(B) (C)
Only one type of polyn1er is fon11ed. The 1nolecular mass of the polymer is a multiple of the monomer unit. The polymer is readily hydrolysed to the monomer. The physical and chetnical properties of the polymer are different fron1 those of the n1onon1er.
The product fanned by the polymerisation of propene, C 3H 6 , may be used as a (A) (B) {C)
(D)
fuel liquid disinfectant plastic material
I 1
's.
Which of the following will NOT the accuracy of the results in a titri analysis? (A)
(B)
(C) (D)
19.
;rty
i
Adding excess water to the c flask Blowing the reagent out pipette tip Overshooting the calibration of the volun1etric flask Purity of reagents
A 300 mg solid sample containing ch is dissolved in water. The chloride i precipitated as AgCl by the additi silver nitrate to the solution of the sa The precipitate is collected, washed, and weighed, and found to have a m 525 mg.
(R.A.M. ofCl = 35.5, Ag = 108)
The mass of chloride present in the sat (A) (B) (C) (D)
74.2 mg 118.0 mg 129.9 mg 208.0 mg
i GO ON TO THF. NEXT PA
fli
-620.
Which of the following statements about gravimetric analysis is NOT true?
(A) (B)
(C) (D)
21.
(A) (C) (D)
22.
(C)
(D)
25.
III. (A) (B) (C) (D)
(C)
(D)
Shot1 wavelength and low energy
fi~equency
Which ofthe following types of electronic transitions would NOT produce absorption in the UVNIS region ofthe spectrum?
26.
;s a
large difference in energy b the bonding and antib orbitals large difference in energy b the bonding and non-b orbitals small difference in energy b the bonding and non-b orbitals sma11 difference in energy b the bonding and antibo orbitals
Which of the following pairs will NOT infrared radiation?
I. II.
Mass spectroscopy UVNIS spectroscopy Gas chromatography Thin-layer chromatography
Long wavelength and high energy Long wavelength and low frequency Short wavelength and high
(B)
23.
(B)
Which two features BEST describe ultraviolet radiation? (A)
Hexane will not absorb light in the U region of the spectrum because ther (A)
Gravimetric analysis is a purely quantitative method. Gravimetric analysis never involves the removal of volatile components of a solid~ The analyte can be identified after precipitation and isolation have occurred. The amount of analyte lost due to solvation is assumed to be negligible.
Which of the following analytical techniques is considered MOST specific for identification purposes?
(B)
24.
H:! and Cl 2 NH 3 and HBr CH4 and Br1 I only 11 only I and III only II and III only
Which of the following statements ab patiition coefficient may be true?
l. I1.
HI.
(A) (B) (C)
s __... p*
(A)
p-+ p"' n __... p*
(B)
{C)
(D)
n-+ s*
(D)
It does not vary with temperat r ;. The so Jute has to be in the ,1pe molecular state in both sol e.nts for it to be a constant. be The two solutions have con centra ted for it to
I only 11 only J and l1 only I. II and Ill
GO ON TO THE NEXT PA
-...,
-7-
27.
Which of the follow ing is NOT a station ary phase used in chron1 atograp hy? (A) (B) (C) (D)
l
30.
Alumi na Cellulo se Silica gel Starch
Which of the followi ng are advant g is of I stean1 distilla tion? I. II.
Ill.
i (B) (C)
I and II only I andl Ill only II and III only
(D)
I, 11 and III
(A)
··
Item 28 refers to the followi ng inform ation.
..I .
A studen t canies out an experim ent using thin-la yer chron1 atograp hy separat ion on silica gel and obtains the followi ng results:
j
Compo und Compo und A Compo undB Solven t 28.
(D)
29.
I
I
31.
Distan ce Travel led (em)
(A) (B) (C) (D)
0.07 0.16 0.73
0.054 0.54 5.4 54.0
?f a
i
IV. (A) (B) (C) (D)
I, II and III only I, II and IV only I, Ill and IV only I, II, III and IV
III.
0.12
pa1tition coefficient is
l~ors 1
Prox~mity.t~ a potential work o~:ce Avail ability to a mea s iI of . , transpm 1atwn Potenti al polluti on of air, lat · nd water Proxim ity to raw materials
I. II.
1.5 9.1 12.5
A solutio n of 10 g of a carbox ylic acid (weak acid) in 100 cm 3 of water is shaken 3 with 100 cm of ethoxy ethane . It is found that only 6.5 g of the acid remain s in aqueou s solutio n at equilib rimn. The
Which of the following are important to conside r in detenni ning the locati factory?
I
The Rr value of Compo und A is (A) (B) (C)
I
It occurs under reduce d pre s~re. The compon ents do not deco 1~ose. t. It provid es savings in fuel
32.
Along with silicon dioxide , which following compou nds constitutes the impurities of bauxite? (A) (B) (C) (D)
lron(II) oxide lron(IIJ) oxide Carbon dioxide Carbon monoxide
GO ON TO THF. NF.XT PAr,
-8Item 33 refers to the follo wing fractions of crud e oil.
I. II. III.
IV. 33.
Dies el Petrol Refin ery gas Kero sene
(A)
In the elec troly sis of brin e u ing the· diap hrag m cell, two by-p rodu c s re (A) (B)
chlo rine and oxyg en
(C)
hydr ogen and merc ury hydr ogen and sodi um h
(D)
The corre ct orde r in tenn s of INCR EAS ING boiJing poin ts is
(B) (C) (D)
37.
38.
I, II, Ill, IV III,I ,IV, II III, II, IV. I IV, II, I, Ill
The prese nce of phos phat e ions ( . 4J-) can be detec ted usin g (A) (B)
(C) (D)
34.
Whi ch of the follo wing prod ucts is NOT prod uced for comm ercia l purp oses by the e]ectroJysis of conc entra ted brine ? (A) (B) (C) (D)
35.
(B)
(C) (D)
36.
(A) (C)
y
Amm oniu m salts Amm oniu m salts
Naph tha
Air Air
n.
Naph tha Amm oniu m salts
IIJ.
IV.
Dete rgent
(A) (B) (C) (D)
I. II and Ill only 1, Ill and lV only II, Ill and JV only L 11, JH and JV
(C) (D)
I.
tion
I
1
. II p I11tes
s~
Whi ch of the follo wing sulph uric acid'?
Air
consumption?
l l 1
J
.ecause
1
I
I
impr ove the flavo ur of ft i help to enha nce the colo ~f food inhib it the oxid ation ofun a: trated fats by help to pres erve the dehy drati on
Fet1ilizer Paint Fibre
Whi ch of the follo wing state men ts does ol NOT accu rateJ y desc ribe a resul t of ethan
(A) (B)
(D)
40.
ate( II)
C mnp oun ds o f· su lP.I1~r sue I1 .as.
(B)
X
amm oniu m moly bdat e pota ssiu m hexa cyan o solut ion pota ssium thioc yana te s sodiun1 thios ulph ate
are used as food addit ives. This they
Chlo rine Oxyg en Hydr ogen Sodi um chlor ate (V)
In the Bosc h-Ha ber proc ess, N., and H~ can be obta ined from X and Y respecti~eJy. T Whi ch of the follo wing pair s BES Y? desc ribes X and
(A)
39.
chlorine and sodium
use
-
Dige stion occu rs in the stom ach. Natu ral inhi bitio ns are re]ax ed (redu ced) . Oxid ation occu rs in the bloo d. Reac tion time is redu ced.
GO ON TO THE NEX T P
Cftf.
I
.
-9-
. 41 .
'.·
(A) (B) (C) (D)
_~i
Deni trifying bacteria
J:l, 1 J1t ·:t.f•. t;;:.:·1
··;o-.:,-•·
'l'i~t···
-·I _j ·.
_j
A bala nced equa tion for the pho toch emi deco n1po sitio n of Freo n- II is CC13F(g)
hr ) 2Cl• (g) + CCI F•
(B)
CC13F(g)
hr > CCl •(g) + F•(g ) 3
(C)
CC13 F(g)
hf ) Cl•( g) + CCl F•(g ) 2
CC13F(g)
hr ) 3Cl• (g) + CF• (g)
(D)
43.
wr. .._D eca y.
Organic N
2
4
Plants
J
l
y
J
I
i.i
compounds Bacteria
Bacteria ...
I I
~
44.
W would MO ST JikeJy be
(A) (B) (C)
cal
(A}
Nitrifying ) bacteria
, f~~~r
n-11 , Aer oso l prop ella nts such as Freo use of CC13 F, are of 111ajor con cern beca e, thei r photochen1icaJ reac tion with ozon ere 0 3 • Ultr avio let radi atio n in the strat osph th(m ch whi , cals radi rine prod uce s chlo reac t with ozon e, prod ucin g oxy gen. 42.
atic
Li !X
J
desc ripti on:
.ii,i·
1
-, Nitrogen _., N2 ~~--:-:R:-:-ai_n7a_n_d-tt--;r g tnin ligh fixation ...-l
Amn 1oni a Car bon diox ide Met han e Wat er vap our
Item s 42- 43 refe r to the foll owi ng
j ~ :~~-
Item 44 refe rs to the follo wing sch diag ram .
nWhi ch of the follo win g is NO T a gree hou se gas?
(D) 45.
nitrates nitrites nitri c(V) acid amm oniu m salts
Wh ich of the foll owi ng plas tic biod egra dabl e? (A) (B) (C) (D)
Low dens ity poly ethe ne Poly then e tere phth alate . Po1y (3 - hydr oxyb utan o1c ac Poly viny lchl orid e
~~ re :
.
1
dO
I i
on of A bala nced equa tion for the prod ucti is ne ozo from oxy gen (A) (B) (C) (D)
0 1(g) + Cl·(g)---.. O(g ) + CIO , •(g) O~(g) + Cl•(g)---.. CIO •(g) + 0 7 (g) O~(g) + CI-( g) ~ O(g ) + ClO.,:(g) O~(g) + CI-(g)---.. O.,(g) + CJO -(g)
END OF TES T TE ~ ~. CH EC K YO Uil WO RK ON TH IS
n1 .......'il.....~: .•• ;s ...:,J;..• ,;.,;,D2::u~
ntr " nu
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.. · TEST CODE
FOR M TP 2011155 CARIB BEAN
02212 010
MAY/JU NE 2011
EXAM INAT IONS
COUN CIL
ADVAN CED PROFIC IENCY EXAMI NATION
CHEMI STRY- UNIT 2 Paper 01 90 minutes ( 07 .JUNE 2011 (p.m) ) READ THE FOLLO WING INSTRU CTIONS CAREFU LLY. 1.
2. 3. 4.
This test consists of 45 items. You will have 90 minutes to answer them. In addition to this test booklet, you should have an answer sheet and a ~ata Booklet.
"
each item Each item in this test has four suggeste d answers lettered (A), (B), (C), (D). Read best. is you are about to answer and decide which choice the space On your answer sheet, find the number which correspo nds to your item and shade below. item sample the at Look havi~g the same letter as the answer you have chosen. Sample Item.· vyllich of the follo~ing is tp.e HIGHES T energy transitio n in an org::mic compoun d?
(;A)· (B)
(t)
·Sample Answer
.n to 0'* n to 1t* to cr* ·· 1t to 1t*
:a
CP)... .' ·.. ... -
stanswer to this item is "cr to cr*", so answer space (C) has been shaded. Th~{l;>e, . .. ~
'.
5.
_l
6.
fill in your !(you want to change your answer, be sure to erase your old answer complete ly and · new choice. you can. If When you are told to begin, tum the page and work as quickly and as carefully as the omitted you cannot answer an item, omit it and go on to the next one. You can come back to answers. correct of item later. Your score will be the total number
7.
You may do a:o.y rough work in this booklet.
8.
Figures are ·not necessar ily drawn to scale.
9.
The use of silent, non-prograrmnl:lble calculato rs is allowed.
DO N.OT TURN THIS PAGE UNTIL YOU ARE TOLn TO DO SO.
Copyright © 2010 Caribbea n Examinations Council All rights reserved .
·
-2-
1.
Which statem ent is true about carbon carbon bonds? (A) (B)
(C)
(D)
2.
butane butene but-1-ene but-2-e ne
It is true that an electro phile must have
(A) (B) .- (C) ' (D)
4.
A double bond is made of a sigma bond and a pi bond. There is a higher electro n density betwee n the atoms in a single bond than in a double bond. The distanc e betwee n the nuclei of the carbon atoms is shorter in single bonds than in double bonds. Single bonds are more reactiv e toward II\ost reagen ts than double bonds. ·
a positiv e charge a negativ e charge a non-bo~~ng electro n .an oxygen or nitroge n atom
; The c9rrect IUPAC name for the structural : formul a . ·: . .·~
(A) (B) (C) (D)
2, 2, 4-trime thyl pentan e 2, 2, 4-trime thyl octane 2, 4, 4-trime thyl pentan e 2, 4, :4-trimethyl octane
In the reactio n betwee n the ethene and bromin e, which statem ent(s) about the reaction mecha nism may be true? I.
II.
III.
(A) (B) (C) (D)
When butan-1-ol is dehydr ated in a suitable piece of apparatus, the produc t is (A) (B) (C) (D)
3.
5.
6.
A carboc ation forms in the rate
determining step. A dative covale nt bond forms between the bromid e ion and the carbocation; Heterolytic fission of the brominebromin e bond occurs. I only I and II only II and III only I, II and III
Which of the follow ing compo unds is MOST likely to underg o hydroly sis?
(C) (D)
Cl -- Cl
l
I
-3-
7.
Which of the following is a pair of optical isomers? CH3
CH3
l
I
. HO-C-C H3
CH3-C- OH
(A) .
I
I
CH3
CH3
H
H
I
I
C~Hs-C-OH
(B)
I
HO-C-C 2Hs
I
(~
CH3
CH3 H
I
H H
I I
H
H
H H
I
I
I
I
I
I
H-C-C -C-C-O H
(C)
I
H
I
H
I
H
CH3H
I
I
I
I
H-C-C -OH
(D)
CH3H
8.
H
I
H
I
HO-C- C-C-C -H
I
H
H H
H
CH3
I
I
H
I
HO-C-C -CH3
I
H
I CH3
Hydrog~n cyanide adds to ethanal but not to ethene because
·.~thanal is more susceptible to electrophilic attack than ethene
(A) .·
(B' · · :·ethanal is more susceptible to free radical attack than ethene (C)· .. _. ethanal is rn:ore susceptible to nucleophilic attack than ethene CP,)· ·.:··:.:the addition·product formed with ethene would be unstable .
.·:
to,'
..
~
.•
I
•
.
{i()
()l\T T() Tl-TP 1\TP YT PAn H'
-4-
Item 9 refers to the molecule shown in the following diagram.
At which of the carbon atoms (indicated
11.
by an arrow and labelled (A), (B), (C) and (D)) in the molecule below is nucleophilic attack MOST likely?
0
~0
H
.
(C)
9.
I.
m.
It will decolourize bromine. It will be oxidized by hot aqueous acidified K.MnO4 • It will give a positive test with
CD)
2
~
'---------- (A) (B)
12.
The complete reaction of phenol with aqueous bromine is characterised by a (A)
Tollen's reagent. (A) (B) (C) (D)
A\CH Br
~CH 3
The above molecule is responsible for the flavour in spearmint bubble gum. Which statements about it are correct?
II.
"c /
(B)
I and II only I and III only II and III only I, Ilandill
(C) (D)
brown precipitate, a brown solution and a sweet smell brown precipitate, a colourless solution and a sweet smell white precipitate, a colourless solution and an antiseptic smell white precipitate, a brown solution ·and an antiseptic smell
·Item 10 refers to the following reaction. 13.
~Br
Which of the following is NOT true about condensation polymerisation? (A)
(B)
10.
;The. pn;>duct of the following reaction is
f.oml.ed by (A) (B)
(C) (D)
free radical substitution nucleophilic substitution elimination reaction electrophilic substitution
(C)
(D)
The molecular mass of the polymer is a multiple of the combined masses of its monomers. The polymer can be hydrolysed to form its monomers. Tht? polymer has physical and chemical properties that differ from the monomer units. Small molecules are eliminated during the condensation process.
i
- 5-
I
_l
14. i
-·
Which of the following compounds would release a proton MOST readily? (A)
CH3 CH2 0H
(B)
C~COOH
(C)
C6H 50H
(D)
CH30H
18.
Which of the following graphs illustrates the titration of dilute sulphuric acid with potassium hydroxide solution? (A)
14b:C 14lL
pH
7
Vol of~ so,.
(B) 15.
A sample of an organic compound with a mass of 0.816 g w~s completely burned in oxygen and fourid to produce 1.55 g of carbon. dioxide and 0.955 g of water only. The empirical formula of the compound is (A) (B) (C) (D)
16.
7
Vol ofH1 S04
(C)
C2H60
:cP)
CzHz04 C 4H 80
(D)
Burette . Beaker .~ Pipette '· Measur~g cylinder
Volof~S04
19.
Which of the following statements about gravimetric analysis is NOT true? (A) (B)
;2-5·:1, ': :25.2,
(C)
--;.,
24.9,
24.8
;The standard deviation of the readings above is
(B)
(C) (D)
0.10 0.13 0.15 0.18.
14LC
pH
7
Item 17 refers_ to: the following burette r~ad~g~:
(A)
14~ Vol of H 2 S04
. ~'
17.
pH
7
C2H402
Which of the following pieces of apparatus possesses the HIGHEST degree of uncertainty in measuremen t? (A) _.(B) (C)
pH
(D)
Gravimetric analysis is a purely quantitative method. Gravimetric analysis never involves the removal of volatile components of a solid. The analyte can be identified after p:r;ecipitation and isolation have occurred. The amount of analyte lost due to solvation is assumed to be negligible.
GO ON TO THE NEXT PAGE
-6-
20.
Treatment of a 10.00 g sample containing a chloride salt with excess silver nitrate solution produced 8.08 g of silver chloride. (Ag = 108, Cl = 35.5)
23.
Hexane will not absorb light in the UV/visible region of the spectrum because there is a (A)
The expression for the percentage of chloride in the sample is
(B)
(A)
143.5 X 8.08 35.5 X 10.00
X
100
(B)
35.5 X 10.00 143.5 X 8.08
X
100
(C)
35.5 143.5
X
8.08 10.00
143.5
X
1Q.Q0
35.5
X
8.08
(C)
:
(D)
X
X
100
X
100
(D)
24.
21.
Which of the following will NOT affect the accuracy ofthe results in a titrimetric analysis?
v-
I.
Purity of reagents Adding excess water to the conical flask Blowing the reagent out of the pipette tip Overshootj.ng the calibration mark of the voll:unetric flask
(A) (B)
(C) (D)
Which of the following pairs do NOT absorb infrared radiation?
II.
;>"1.:>
large difference in energy between the bonding and antibonding orbitals large difference in energy between the bonding and non-bonding orbitals small difference in energy between the bonding and non-bonding orbitals small difference in energy between the bonding and antibonding orbitals
~OandHI
rv.
III.
H 2 and Cl2 NH3 and HCl N 2 and Br2
(A) (B) (C) (D)
-I and III only I and IV only II and III only II and IV only
:' .. 22.
· The structural features which cause :: ~~sorj}tion in the_· UVNIS region of the · ¢.:t~·c~otnagnetic spectrum are known as
..
'
.
·:·f
. (~)· : -cr bonds 1.·03) · cbromophores isolated 1t bonds :(C) (D) lone pairs of electrons
25.
In which of the following processes is infra-red spectroscopy MOST likely used? I. II. III.
Monitoring atmospheric pollution Breath-alcohol analysis Quantitative analysis ~·
(A) (B) (C) (D)
I only II only I and II only I and III only
GO ON TO THE NEXT PAGE
l ;. I
-7-
26.
,_._
In the mass spect rome ter, a mole cular ion is form ed from a comp ound by
27.
(A) (B)
loss of a proto n gain of an elect ron loss of an elect ron fragm entat ion of the comp ound
(A) (B) (C) (D)
Whic h of the follo wing is NOT a visualising agen t in chrom atogr aphy ?
(C) (D)
Cellu lose Iodin e Ninhydrin Ultra viole t light
ethanol, whic h is obtai ned when a 1 : 1: 1 : 1 mixtu re of Item 28 refer s to the follo wing chrom atogr am sed by gas-l iquid chromatography. propa n-1-o l, butan -1-ol and hexa n-1-o l is analy I II
m I Ethan ol
IV
II Prop an -1- ol III Buta n -1- ol
N Hexa n -1- ol
5
0
28.
10
Reten tion time (min )
Whic h i,omp ound is .present in the IDGH EST i,'
1
conc entra tion?
I
Ethan ol (A)' $): . · ·Buta n-1-o l (C): . Hexa n-1-o l · (D)'· · <" ·_Propan-1-ol .· .
• '·! .
.
•.
GO ON TO THE NEX T PAG E
I
l
-8-
I.
Item 29 refers to the following boiling point composition curves for three mixtures ..
I.
II
c _ __ _ _ _ _ _ _ - - · - -
I
II
III
Which of the following CANNOT be completely separated by fractional distillation?
29.
I only II only I and II only II and III only
(A) (B) (C)
(D)
Which of the following statements about a partition coefficient may be true?
30.
I.
n.. -III. t
~
.' .. ••
31.
It does not vary with temperature. The solute has to be in the same molecular state in both solvents for it to by a constant. ··The two ·-solutions have to be .: · ·concentrated for it to be a constant.
\Vhich of the following are important factors to consider in determining the location of a factory? L II.
III. Iv.
•
,{1\).
::cfi3).
..
C¢Y> CD} ..-:
I only II only I and II only I, II and :Q:I
(A) (B) (C) (D)
Proximity to raw materials Proximity to a potential workforce Potential pollution of air, land and water Availability to a means of transportation
I, I, I, I,
II and III only II and IV only III and IV only II, III and IV ,•
32.
When extracting aluminium from its bauxite ore, the bauxite is (A) (B) (C) (D)
electrolysed heated with carbon dissolved in molten cryolite to reduce the melting point dissolved in molten cryolite to reduce electricity costs
GO ON TO THE NEXT PAGE
l
- 9I
I. i
33.
Which of the following is represented by C 1 - C 4 hydrocarbons? (A) (B) (C) (D)
36.
Kerosene Diesel oil Gasoline Refinery gas
Which of the following conditions would favour the forward reaction?
I.
III. IV
34.
35.
Diesel Petrol Refinery gas Kerosene
I, II, Ill, IV Ill, I, IT, IV III, II, I, IV III, II, IV, I
(~);.
I only I and II only II and III only I, II and III
Item 37 refers to the manufacture of chlorine by the electrolysis of brine using the diaphragm cell.
37.
The anode is made up of (A) (B) (C) (D)
The essential ~onditions for the Haber process are (A)
(A) (B) (C) (D)
IT.
The correct order in terms of increasing boiling point is
(A) (B) (C) (D)
III.
Low pressure Excess oxygen Low temperature
I.
Item 34 refers to the following fractions of crude oil.
IT.
In the production of sulphuric acid by the contact process the following exothermic · reaction takes place:
steel graphite platinum with a coating of asbestos titanium wi~h an inert coating of ruthenium (IV) oxide
?- Atm pressure, 400 oc, iron catalyst
· 2 Atm pressure, 450 oc, no catalyst
Cfl. . f'OO Atm pr~ssure, 450 °C, iron .. . ::catalyst (Dji . : .. 200 Atm pressure, 1000 .(. · ·. _: -~atalyst
oc,
no
38.
For which TWO of the following industrial products is chlorine MOST widely used in their manufacture? I. II. III. IV.
Solvents Sodium chloride Poly'Viny!chloride Chlorofluoroca rbons
(A)
I and II only I and III only II and III only II and IV only
(B)
(C) (D)
- 10-
Which of the followi ng industr ies use sulphur ic acid?
39.
I. II. IIi. IV.
(A) (B)
(C) (D)
43.
Fertiliz er Paint Fibre Deterge nt
(A) ,(B)
I, II and III only I, III and IV only II, III and IV only I, II, III and IV
(C)
Which of the following is a disadvantage of using chlorine for water purification?
40.
(A) (B)
(C) (D)
Chlorin e promote s eutrophication. Chlori ne contrib utes to the depletio n of the ozone layer. Toxic chlorin ated hydroc arbons may be formed. Toxic chlorin e gas may threaten nearby homes.
(D)
44.
. I.
II. III.
.
(A) (B)
PCP4
(C) (D)
Global warmin g Photoch emical smog Greenhouse effect I only II only I and III only I, II and III
''·.
45 .
.··:Iv.· ·. . ..
CI-
.·... . .. (A).· .. I and II only ; :. (B) ·: ' I and Ill only I, II and III only ... (C) I, II, III and IV . (D)
42.
the chlorine radical is more reactive than the fluorine radical the fluorine radical is more reactive than the chlorine radical the bond enthalp y of the C - Cl bond (340 kJ mol- 1) is less than that of the C - F bond (484 kJ mol- 1) the bond enthalp y of the C - Cl bond corresponds to the energy of the ultraviolet radiation
Which of the following may be a result of light-induced reaction of pollutants in the air? I.
Which of the following ions are significant contributors to eutrophication?
41.
When chlorofluorocarbons are ilnpacted by ultraviolet radiation, chlorine radicals are formed in preference to fluorine radicals. This occurs in the upper atmosp here because
Which of the follow ing plastic s are biodegradable? (A) (B) (C) (D)
Polythene terephthalate Low density polyethene P-oly (3 - hydroxybutanoic acid) Polyvinylchloride
Which of the following compounds is NOT a primary pollutant? (A) (B) (C) (D).
Carbon monoxi de Nitroge n dioxide Nitroge n monoxi de Sulphur dioxide
ON THIS TEST. IF YOU FINIS H BEFO RE TIME IS CALL ED, CHEC K YOUR WORK
-2-
1.
Which of the following pairs of formulae is true for butanoic acid?
Molecuhnr lFon·nu.nla (A) (B)
(C) (D) 2.
C4Hs02 C4H60z C4Hs02 C4H80
EmpJirical Formula
(C) (D)
H
H
"" /
(A)
CH20 CH2 0 . C 2H 4 0
C 2H 4 0
H
Cotnbustion analysis of 0.18 g of an organic cmnpound produces 0.396 g of carbon dioxide · and 0.216 g of water. The empirical formula of the compound, given that it contains carbon, hydrogen and oxygen only, is (A) (B)
The compo_und which shows both cis-trans isomerism and optical isomerism is
3.
c
c /j"'H
/
c
H
""/ c H
H
Cl
"c c
I" H
C4 H80
/
c
"
/
H. / H
CzHs04 C3H 80
" " Br
Cl
(B)
/ C-H
C-H
/
"
H
Cl
C6Hl60z H
H
"" c
(C)
/I"Br
H
·,w··
(D)
.,
c H
c
/
c
H
/
H
"
H
H
H
H
c
/
/I"- H H
""/ c c
/
" /
H
C-H
"
H
H
- 3-
4.
When propane reacts with CI 2 (g) in the presence of sunlight, two possible monosubstituted products, 1-chloropropane and 2-chloropropane are formed. What is the ratio of 1-chloropropane to 2-chloropropa.ne? (A)
1:2
(B)
1:3
(C)
2:1 3: 1
(D)
7.
· The equation for the formation of the anaesthetic, CF3CHBrCI. is CF·3CH2Cl
3
(A) (B) (C)
electrophilic substitution free radical substitution nucleophilic addition nucleophilic substitution
The formula, C6 ~5 COOH. indicates that (A) (B) (C) (D)
6.
.CF CHBrCI.
The type of reaction occurring is
(D)
5.
Brz --j.
an acid group is present the componnd is ketone the cotnpound is derived from hexane seven carbon atoms are arranged in a chain
8.
The mechanism used is (A) (B) (C) (D)
In the reaction between ethene and bromine, which statements about the reaction mechanism may be ttue? I.
II.
III.
(A) (B) (C) (D)
A carbocation fonns in the rate detennining step. A dative covalent bond forms between the bromide ion and .ethene. Heterolytic fission of the brominebromine bond occurs.
I only land II only II and III only I, II and III
Ethanol can be formed by the following reaction:
1'1tf··
electrophilic addition nucleophilic addition electrophilic substitution nucleophilic substitution
-49.
2-hydr oxy- 2 -tneth ylprop anoic acid c~m befon ned from propan
one in the two steps, illustrated below.
St~ep X
>
J
CH3 -C-C =N
StepY
. I ..
I·
>
Which of the follow ing statem ents about these steps may be
10.
I OH
Step X involves nucleophilic addition. Aqueo us potass ium cyanid e is the reagen t in Step X. Step Y involves hydrolysis.
(A) (B) (C)
!only I and II only II and III only I, II and III
(A) (B) (C) (D)
Butan e EU1a.nol Ethene Ethano ic acid
11.
. "'OH
true?
L II. III.
Which of the following compounds will NOT decolotnizebromine water but will decoloUlize potass ium manga nate(V ll) on wanni ng?
4
CH3 -c- c
OH
(D)
O
CH3
CH3
A compo und, X, reacts with I.
II.
III.
2, 4-dinitrophenylhydrazine (DNPH ) to give an orang e precip itate Fehlin g's soluti on to give a red precip itate aqueous alkaline iodine to give yellow
crysta ls Comp ound X is MOST likely
(A)
(B)
(C)
(D)
CH2 COCH 3
@-cuo
-5-
hem 13 refers to the following structure of tyrosine.
Ite1n 1Z refers to the following reaction.
co2 n:
c&Br
I
.iHlzN-~-- JHi
ClHI:z
12.
(A) (B) (C) (D)
Jl4.
an elimination reaction electrophilic substitution free radical substitution nucleophilic substitution
Olffi
13.
The pH of tyrosine is MOST likely (A)
2.1
(B)
5.6
(C) (D)
7.0 9.0
Which of the following is NOT true of addition polymerisation? (A)
(B) (C) (D)
15.
¢
The product of the following reaction is fonned by
Only one type of polymer is formed. The molecular mass of the polymer is a multiple of the monomer unit. The polymer is readily hydrolysed to the monomer. the monomer. The physical and chemical properties of the polymer are different from those of
Which of the following is t:J.ue for starch and glucose? Sta.:rd11
""!t:r..a.,
Ghncos~
(A)
High solubility in water
High solubility in water
(B)
Low solubility in water
Low solubility in water
(C)
Gives blue/black colour with iodine
Gives blue/black colour with iodine
(D)
No reaction with Fehling's solution
Reduces Cu2+ in Fehling's solution to red/brown CuzO h·
GOON TOTH RNRX TPAGE
-616.
Whic h of the follow ing sets of titrati on readin gs is the MOS T precis e? (A)
25.1
25.5
25.1
25.2
(B)
24.9
24.5
25.2
25.4
(C)
25.0
25.0
24.9
24.8
24.5
24.8
24.6
(D)
17.
25.0
20.
The expre ssion for the perce ntage of chlori de in the sampl e is
(A)
Whic h of the follow ing is NOT a prope rty of a prima ry standa rd? (A) (B)
(C) (D)
Treat ment of a 10.00 g samp le conta ining a chloride salt with ex:cess silver nitrate sol ution produ ces 8.08 g of silver chlori de. (Ag= 108, Cl = 35.5)
Does not under go hydro lysis Low relative molec ular mass Obtai nable in a pure state Very solubl e in water
3 What is the conce ntrati on (tnol dm- ) of an aqueo us soluti on that conta ins 63.3g of 3 K 3 Fe(CN ) 6 in 1.0 dm of soluti on? [The relative formu la mass ofiSF e(CN ) 5 is 329.2.]
(A) (B) (C)
(D)
19.
21.
1.92 x 1o- 1 2.95 X 1()4 3.11
X
35.5x 8.08 x 100 108><10.00
(C)
35.5x lO.OO xlOO 143.5 x8.08
(A)
1
(B) (C) (D)
Natur ally occur ring Elem ent X has four 54 53 isotop es: 50X, 52:X, X and X. They hav~ perce ntage abund ance of4.3 1, 83.76 , 9.55/·· and 2.38 respec tively . What is the relativ e atomi c tnass of X? (A) (JB) (C)
52.00 52.06 52.25
(D)
53.00
22.
35.5x 8.08 >
143.5 xl0.0 0
A comp ound absor bs light of freque ncy 940 MHz. The wave length . in em. of the light 1 8 absor bed is (c = 3.0 x 10 m s· )
l0-3
5.77 X lo-
108X 8.08
(B)
(D)
13.
35.5X l0.00 xlOO
31.91
31.91 X lQ-2 31.91 X lo- 1 31.91 X 1()"
Which two fean.u·es BEST descri be ultrav iolet radiation? (A) (B)
(C) (D)
Long wavel ength and high energ y Long wavel ength and low freque ncy Short wavel ength and hlgh frequency Short wavel ength and low energ y
GO ON TO THE NEX T PAGE
23.
(A)o
-7-
(B)o~ ~·
24.
(B)
(C)
(D)
27.
III. IV. (A) (B)
(C) (D)
Which of the following is NOT a stationary phase used in chromatography? (A) (B) (C) (D)
cL cL L [X] L [X]
H 20 and HI
H 2 and Cl 2 Nl-13 and HB r CH4 and Br2 I and III only I and IV only II and III only II and IV only
Sample X
(D)
Cellulose Silica gel Starch
Sample X is a mixture of substances. X was separated into its components using paper chromatography simultaneously with individual samples of e, f, g and h. The chromatograph produced is shown below.
Which of the following species is NOT a·,,.~ significant fragment from the mass spectrum of ethanol? (A) (B) (C)
Alumina
Item 28 refers to the following information.
Which of the following pairs do NOT absorb infrared radiation? I. II.
26.
log 10 (I/1) = E 1ogiO (IIlo) = E log 10 (!0 /I) = E 1og 10 (I/10 ) = E
A. max ?
/}
Which ofthe following equations goven1s the determination of an unknown compound, X, in a solution by UVNIS spectroscopy? (A)
25.
(C)o (D)o
vVhich of the following alkenes has the wavelength of maximtun absorption,
C 2H 5 0H+ CzHs+ CH3+ OH+
28.
e
f
g
h
Which substances are MOST likely present in Sample X? (A) (B)
(C) (D)
e, f, g e,f, h e,g,h e, f, g, h
- 8-
29.
k A solu tion of 10 g of a carb oxyl ic acid (wea 3 of wate r is shak en with acid ) in J 00 cxn n.ly 100 cm3 of etho xyet hane . It is foun d thato tion solu ous 6.5 g of the acid remains in aque is at equi libri um. The patti tion coef ficie nt (A)
(B) (C)
(D)
31.
rs Whi ch of the follownng are impo rtan t facto a of tion loca the ing nnin to cons ider in dete facto ry?
I. II.
0.05 4 0.54 5.4 54
HI. IV. (A) (B)
s !tern 30 refe rs to the follo wing appa ratu ons. arati prep used in orga nic
(C) (D)
32.
(C)
(D)
s For whic h of the follo wing is the appa ratu NOT suita ble? (A) (B)
(C)
(D)
Con yers ion of phe nyla min e to bew.....enediazonium chloride Con vers ion of buta n .._, 1 - ol to 1 - brom obut ane Oxi dati on of prop an - 2 - ol to-" propanone
33.
I, II and III only I, II and IV only I, III and IV only I, II, III and IV
the The extr actio n of aluminiuxn invo lves in d olve diss ite baux fied puri of sis elec troly IN mol ten cryo lite, Na 3 AIF6 . The MA purp ose of the cryo lite is to (A) (B)
3({).
Prmdmity to a pote ntial work forc e Ava ilab ility to a xnea ns of transportation Pote ntial poll utio n of air, land and wate r Prox imit y to raw mate rials
prev ent the oxid ation of the anod es increase the electrical conductivity of the melt redu ce the: Inel ting poin t... of the mixture prev ent the reox idat ion of the · alwniniurn form ed at the cathode
the In the fractional disti llati on of crud e oil, on d base rated sepa are s tion diffe rent frac
their (A) (B)
0Jlid ation of meth anol to meth anoi c
(C)
acid
(D)
34.
polarity volatility viscosity solubility
d Pen nentation of sugars to alcohol is controlle as n know ly ctive colle tnes by a sexies of enzy (A) (B)
(C) (D)
amylase lipase sucr ase zym ase
GO ON TOT HEN EXT PAG E
-935.
In the Bosch-Haber process, N2 and H 2 can be obtained from X andY respectively. Which of lhe: following pairs BEST describes these sources?
X (A) (B)
36.
Ammonium salts Ammonium salts
38.
y
(A) (B) (C)
Naphtha
(D)
Air
Naphtha
(D)
Air
Ammonium salts
39.
I. II. III.
Which of the following ate consequences of the consmnption of alcohol?
II. III.
Depresses the central nervous system May cause liver disease Reduces manual dexterity
(A) (B) (C) (D)
I and II only I and III only II and III only I, II and III
V\fhich of the following industries use sulphuric acid?
IV. (A) (B)
(C)
(D) 40.
In the electrolysis of brine using the diaphragm cell, two by-products are
(A)
chlorine and oxygen
(B) (C) (D)
chlorine and sodimn hydrogen and mercury hydrogen and sodiwn hydroxide
·Fettilizer Paint Fibre DetergentI, II and III only I, III and IV only II, III and IV only I, II, III and IV
The biological oxygen demand (BOD) of water measures the amount of oxygen (A) (B)
37.
HClO CaCI 2 NaClO NaC103
Air
(C)
I.
Chlorine is the active component for swimming pool disinfectants, although it is a poisonous gas. Which salt below is used as a safe chlorine source?
(C)
(D)
present in a fKxed volume of water produced by aquatic plants in photosynthesis needed by microorganisms as they decompose organic matter used by aquatic organisms during respiration
.
; .,
- 10-
The pres ence of pho spha te ions (PO /-) be dete cted usin g
4JL
(A) (B)
(C)
(D)
ram Item 44 refe rs to the sche mat ic diag below.
can
arrunoniwn molybdate sodi wn th.iosulphate pota ssiu m thiocyanate solution pota ssiu m hex acy ario ferr ate( Il) solution
,_~fi,_x-a~tion
Den itriz ying bact eria
j
~ •
Nitrifying bact eria
Org anic
N2
olyt ic . Chl orof luor oca rbon s und ergo hom in light et viol ultra to fission by bein g expo sed the stra tosp here .
42.
Rain and ligh tnin g
Nitro~
~
Plan ts
com pou nds
Bacteria
z
Bac teria
Cl? Whi ch radical coul d result from CI-IzFCF2 (A) (B) (C)
"CH2CF2Cl CH2F"C F2
(D)
CH2F"C FCI
44.
W wou ld MO ST likel y be (A) (B) (C)
"CH FCF2 Cl
(D) ·
43.
on Wh ich of the foll owi ng stat eme nts ? true is cts effe l envi ronm enta (A)
(B)
(C)
(D)
Gre enh ouse effe ct lead s to glob al wan ning . Glo bal war min g leads to greenhouse effe ct. Pho toch emi cal smo g lead s to global warm ing. Eutr oph icat ion lead s to gree nho use · effe ct.
IFY OU F!N JI§l t-IB EJl. iOR ET! ME ISC
0221 201 O/C APE 20 l 0
45.
nitrates nitri tes
nitric(V) aci.d amm oniu m salts
, is The burn ing of poly viny lchl orid e, PVC ique tedm osal con side red an imp rope r disp beca use PVC (A) (B)
(C) (D)
form s toxi c prod ucts caus es acid rain dest roys the ozo ne laye r has a very high mel ting poin t
AL LED ,CH ECJ KY OU l-tW OR JI'O NT
illS 'IES T.,
.,.,.,/
TESTCODE02212010
FORMTP 2009158
1vfAY/JUNE2009
CARIBBE AN EXAMINA TIONS
COUNCIL
ADVANCED PROFICIENC YExAM1:NA TION CHEMISTRY - UNIT 2
.
PaperOl
90minutes
(o9 JUNE 2009
(p.m.D
READ TBE FOLLOWING INSTRUCTIONS CAREFULLY . 1. . 2.
This test consists of45 items. You will have 90minutesto answerthem. In addition to this test booklet, you should have an answer sheet.
3.
Do notl;>e concerned that the answer sheetprovides spaces formore answers than there are items in this test.
4.
Eachiteminthis te:Stbasfoursug gestedanswersl ettered(A),(B); (C),{D). Readeachitem you are about to answer and decide which choice is best. ·
5.
On your answer sheet, find thenumberwhic hcorrespondsto your item andsb.aciethe spacehavmg
the same letter as the answer you hav~ chosen. Look at the sample item below. Sample Item
Wbichofthe following is the HIGHEST energy transition in an organic compound? (A) (B) (C) (D)
Sa.mpleAnswer
n to cr* n to 1t* cr to cr* 1t to 1t*
@®G@
The best answer to this item is "cr to cr*", s6 answer space (C) has been shaded.
7.
Ifyou want to change your answer erase it completely before you fill in your new choice. When you are told to begin, turn the page and work as quickly and as carefully as you can. Ifyou cannot answer an item, omit it and go on to the next one. Your score will be the total number of correct answers.
8.
You may do any rough work in this booklet
9.
Figures_ are not necessarily dra\ltn to scale.
10.
The use ofnon-program mable calculators is allowed.
6.
.I
--
·-
-= i iiiiii
DO NOT TURN THIS PAGE UNTIL YOU ARE TOLD TO DO SO.
-
-
Copyright© 2009 Carib beanExarninatio ns Council. All rights reserved.
" """'"Z'
~
iii.iii
-
0221201 O/CAPE2009
-.21.
Volatility of organic compo11nds depends on the strength of the intennolecu lar forces
5.
present Which compound below would be the MOST volatile? (A) (B)
(C) (D)
2.
(D)
3.
CH3 CH2 C:t~COOH
6.
m.
The couect IUPAC name for the structural formwa
I
CH3 CH3
I
I
H-C-CC H2CHCH3
I H (A) (B) (C) (D)
~(aq)
NaOH (aq) KMnO 4 (acidified)
bromine, which statements about the reaction mechanism. may be true?
IT.
C 3H 8 0
Br2 (aq)
In the reaction between the ethene and
L
C4H 1 0 C 2H 1 0 4 ~6HI60l
H
4.
(A) (B) (C) (D)
CH3 CH2 C~OH C~CH 2 CH2 C~ CP~CH(CH 3)CH3
Combustion analysis ofO.l S g of an organic compound produces 0396 gofcarbon dioxide and0.216 gofwater. The empirical formula of the compound, given tb.S.t it contains carboil, hydrogen and oxygen only, is (A) (B) (C)
A motorist suspects that his gasoline is contaminated \vith ethanol. Which reagent can the motorist use to detect the presence of ethanol?
A carbocatio n forms in the rate detmnining step. A dative covalent bond forms between the bromi~ ion and the carbocati.on. Heterolytic fission of tb«~ brominebromine bond occurs.
(A)
Ionly
(B) (C) (D)
I and ll only !Iandillon ly I, II and ill
is
I
7.
CH3
Which ofthe following does NOT descnbe a
nucleophile?
-~ 2, 4-trimethyl pentane
2, 2, 4-trim.ethyl octane 2, 4, 4-trimethyl pentane 2, 4, 4-trimetbyl octane
(A) (B) (C) (D)
Lewis acid Lewis base Species with a lone pair Reagent which attacks electron deficient sites in molecules. ·
Which of the following compounds show optical activity?
I. II.
m.
~CH(OH) COOH
HOCH = CHOH . ~CH (CI) c~
N.
HC(Br)IC l
(A) (B) (C) (D)
I and II only
.
I and N only ll and m only .illandlVo nly.
GO ON TO THE NEXT PAGE . 02212010/CAPE2009
-38.
2-hydroxy- 2 - methylpropan oic acid can be formed from p~opanone in two steps, illustrated below. CH3
I I
CH3 -C-C:::N
).
Step Y
OH
Which of the following statements about these steps may be true?
ill.
Step X involves nucleophilic addition. Aqueous potassium cyanide is the reagent in Step X. Step Y involves hydrolysis.
(A)
Ionly
(B) (C)
ITandillonly
I. IT.
(D)
I and II only I, II and m
Item 10 refers to the following reaction.
Item 9 refers to the following reaction.
Reagent
> Br
9.
The reagent in the above reaction is (A) (B) (C) (D)
11.
Br2 I sunlight Br2 I FeBr3
Concentrated ~S04 I cone. HN0 3 Concentrated HCl/ Sn
10.
The product of the following reaction is formed by (A) (B) (C)
(I))
free radical substitution mtCleophilic substitution an elimination reaction electrophilic substitution
Which of the following compounds is the strongest acid?
GO ONTO THE NEXT PAGE 02212010/CA PE2009
-.4-
12.
e inducti ve and negative \Vbich ofthe following options is correct for the conjugative, positiv below? res structu the inducti ve effect, shown by OH
t
Q
@ lo~L
I
H - C--7- 0
I
H
(A)
Negative inductive effect
Positive inducti ve effect
Conjug ative effect ·
(B)
Conjugative effect
Negati ve inducti ve effect
Positive induct:i:ve --
(C)
Negati ve :inductive effect
Conjug ative effect
Positive inductive effect
(D)·
Positive inductive
Conjugative effect
Negati ve inductive effect
effect
13.
70
R
'Which of the follow ing is NOT 1rue about
condensation polymerisation? (A)
(B) (C)
(D)
Themo lecular mas8 ofthep olyme r is a multiple oftb.e combined. masses ofits monomers. The polym er can be hydrol ysed to form its monome.r:s. The polym er has physic al and chemical properties that differ from the monomer units. Small molecu les are elimin ated during the condensation process.
14.
effect I
The repeating unit obtained from the addi:tion
polymerisation ofthe mono~ CHCl = CHCl is
H
H
H
I
I
I
I
I c1
I a
I a
I a·
H (A) -
c- c - c - c H . H I I
(B)
-e-eI
l CI
(C)
(D)
Cl
Cl
H
I
I
-e-el
I
Cl
H
Cl
H
Cl
H
I
I
I
I
1 Cl
I H
I Cl
I H
- c - c - c - cGO ON TO THE NEXT PAGE
0221201 0/CAPE2009
-515.
·Which ofthe following is true for glucose and starch? Glucose
Starch
16.
(A)
High solubility in water
High solubility in water
(B)
Low soh~bility in water
Low solubility in water
(C)
Gives blue/black colour with iodine
Gives blue/black colour with iodine
(D)
No reaction with Fehling's solution
Reduces Cu2+ in Fehling's solution to red/brown Cu20
Which of the following pieces of apparatus possesses the HIGHEST degree of uncertainty in measurement?
19.
Which of the following statements about gravin;letric analysis is NOT 1rue? (A)
(A) (B)
(q (D)
17.
Burette Beaker Pipette Measuring cylinder
(B)
ofasolid. .
used in titrimen-y?
18.
Barometer Thermometer Potentiometer
(D)
Conductivitymeter
The concentration of an ammonia solution is determined by titrating 25.0 cm3 ag3.inst 0.2 J?Ol dm-3 sulphuric acid to give an end point of27.5 cm3 • The concentration ofammonia ("mmol dm:l) is given by
analysis is a purely quantitative method. Gravimetric analysis never involves therernovalofvohrtilecornpon~
(C)
The analyte can be identified after
(D)
precipitation and isolation have occurred. The amount of analyte lost due to solvation is assumed to be negligible.
Which ofthe following is NOT an instrument (A) (B) (C)
·Gravime~c
20.
Treatment of a 10.00 g sample containing a chloride salt with excess silver nitrate solution produced 8.08 g ofSI1ver chloride. (Ag= 108, Cl=35.5) The expression for the percentage of chloride in the sample is
(A)
143.5x8.08 xlOO 35.5xl0.00
(A)
0.2x 27.5 25
(B)
35.5xl0.00 xlOO 143.5x8.08
(B)
0.2x27.5 2x25
(C)
35.5x 8.08 xlOO 143.5 X 10.00
(C)
2x0.2x27.5 25
(D)
143.5 X 10.QQ xlOO 35.5x 8.08
(D)
2x 0.2x 25 27.5
GO ON TO TID~ NEXT PAGE 02212010/CAPE2009
-?\Vhich ofthe followingutilizesvibrations?
21.
(A) (B)
(C) (D)
22.
Radio wave Infrar ed UVN IS X-ray
The struc tural feature·s whic h caus e absor ption in the UVN IS regio n of the electroma~etic spect rum are know n
(A) (B) (C) (D)-
23.
25.
as
26.
crbonds chromoph(!res isolated 1t bonds lone pairs of electrons
2 The co~lex ion [FeSC N) + has a mola r 1 1 3 absorptivity (E) of7.0 x 10 (im3 mol- cm- •
27.
2cmcell,~
24.
3 X 1o-J mol dm-3
6 x 1Q-3 mol dm.-3 3 x 10-4mol dm-3 6 x 10-" mol dm"3
. 28.
(B) (C) (D)
Which oftbe following is NOT a visualising agent in chrO'matography? Iocline.
(A) (B) (C)
Cellulose N"mhydrin
(D)
t.ntraviolet light
Which ofthe following is LEAST commonly used as a statio nary phas e in chrom a-
IR
(A) (B) (C) (D)
The wave lengt h corresponding to this absorption is
(A)
"loss of a proto n gain of~ electron loss of an electron fragmentation ofthe compound
tography?
spec trum , an abso rptio n at 1 spond s to an -OH group in corre cm3400 a .molecule. (lJ.L m = l~m)
In an
In them_ass spect rome ter a molecular ion is formed from a comp~und by (A) (B) (C) (D)
.The concentration ofits solution, which gives an abso:Fbance of 4.2 when meas ured in a
(A) (B) (C) (D)
W'nich of the follow ing speci es is NOT a· significant fragment from 1he mass spect rum of ethanol? ·
0.294 p.m 2.94 J.liD. 29.4 Jlill 294 J.llD
29.
Starc h Alum ina
Silie;a gel Cellulose
Which of the following are advantages of steam disti11.a1ion? I. II. ill.
It occurs unde r reduc ed press ure. The components do not decompose. It provides savings in fuel cost.
(A) (B) (C) (D)
I and ll onlyI and ill only . II and ill only I,ll and ill
GO ONT O THE NEXT PAG E 02212 010/C APE2 009
-7-:
30.
Which of the followin g statemen ts about partition coefficie nt may be true?
33.
It does not vary with temperature. The solute has to be in the same molecular state in both solvents for it to be a constant. The .·two solution s have to be concent rated for it to be a constant .
I. II.
m.
34.
31.
II only I andll only I, II and ill
Proximity to housing schemes Proximity to port
I.
m.
35.
fertilizers the nitrogen cycle fractional dist:iJ.lation ofliquid air fractional distillation of crude oil
Which of ~e followin g is NOT ne:essar y for wine making?
(A) (B) (C) (D)
Good electricity supply Iandllo nly
(A) .(B) (C) (D)
!IandiD only II, ill and IV only
I, II, m and IV
36. Along With silicon dioxide, which of the followin g compou nds constitut es the main impurities of bauxite?
.
Iron(II) oxide Iron(lli) oxide Carbon dioxide Carbon monoxid e
Yeast
Oxygen Enzyme Carbohydrate
Which ofth.e followin g are conseque nces of the consump tion ofalcohol?
ill~
Stimula tes the central nervous system May cause liver disease Reduces manual dexterity
(A) (B) (C) (D)
I and IT only I.andillo nly rr and ill only I, II and ill
I.
IT. (A) (B) (C) (D)
Dieseloi1 Gasoline Re:finezy gas
Goodr~adnetwork
. IV.
32.
Kerosine
The nitrogen used in the manufac ture of ammoni a by the Haber Process is obtained from
(A) (B) (C) (D)
Which ofthe followin g influence location of an industrial plant?
n.
c4
(A) (B) (C) (D)
!only
(A) (B) (C) (D)
'Which of the followin g is represen ted by cl- hydrocar bons?
I
\
GO ON TO THE NEXT PAGE 0221201 0/CAPE2 009
- 8ine Item 3 7 refers to the manufacture of chlor the g usin e brin of sis by the elec troly diaph ragm cell.
40.
The anod e is mad e up of
37.
(A) (B) (C) (D)·
steel graphite plati num with a coating of asbestos titan ium with an inert coati ng of ruthe nium (IV) oxide
MOS~widelyused?
II.
Polyvinylchloride
(A) (B) (C)
land II land ill Tian dill llan diV
(D)
39.
Solventl Sodi um chloride
m. rv.
Cblorofl.uorocaxbons
"Which of the follo wing indu strie s use sulphuric acid? I. II.
m.
rv.
Fert:i1fzers Paint
Fibres Dete rgen ts
(~
I, II and m only
{B) (C) (D)
I, ill and IV only II, m and IV only I,II, illan dN
prese nt in a fixed volu me ofwate r used by aqua tic orga nism s durin g
(C)
need ed by micr oorg anism s as they deco mpos e orga nic matt er prod uced by aqua tic plan ts in photosynthesis
(D)
the For the man ufac ture of whic h TWO of rine chlo is ucts prod l stria indu follo wing
I.
(A) (B)
respiration
41.
38.
of The biolo gical oxyg en dem and (BOD) en wate r meas ures the amo unt of oxyg
t Whi ch o~tb.e follo wing ions are signi fican contributors to eutrophication?
I.
PO/ -
II.
No;
m.
SOl -
IV.
a-
(A) (B) (C) (D)
42.
Iand llon ly Iand illon ly
I, nan d m only I, II, m and IV
to A redu ction in the ozon e layer is believed of n actio the by ed caus have been (A) (B) (C) (D)
sulphur dioxide CFC s meth ane carbo n dioxide
GO ONT OTH ENE XTP AGE 0221 2010 /CAP E200 9
-9-
43.
/
Which of the following statements on environmental effects is true? · (A)
Greehouse effect leads to global
(B)
war.tniD.g. Global warmmg leads to greenhouse
(D)
Nitrogen monoxide, NO, is respoilSlble for the destruction of ozone in the stratosphere. How can NO be generated in the atmosphere? I.
n. III.
~ffect.
(C)
44.
- Pbtotochemical smog leads to global warming. Eutrophication leads to greenhouse
(A) (B) (C) (D)
effect.
45.
Combustion offossil fuels Lightning discharge Reduction ofN0 2 by S0 2,, both of which are present in the a1mosphere
landllonly Iandllionly IIandillonly
L IIandiD
Which of the following plastics are biodegradable ?
(A) (B)
Polythene terephthalate Low density polyethene
(C)
Poly (3 - hydroxybutanoic acid) Polyvinylchloride
(D)
lFYOUFINISHBEFORETIMEIS.CALLED,CHECKYOiJRWORKONTIDSTEST.
j'
f
0221201 O/CAPE2009
I
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1.
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I l I I I
I I .I I
lEST CODE
2.
'··
I ·I
I I I I I I I I I I I I I I I I I
I I I
I I
I I
l
I I
r I
I I I I I I I
I I I
I I
1 I I I I I I I
f
f
AFFIX SEAL HERE
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YoumuststgD-be.lo~a~dretun,.thi&bookletwiththe do so may _result in TEST CODE Answer Sheet. Failure disqualificadon. .
·
to
22212010
.
·: ' . .
FORM TP20081 68
MAY/JUNE200 8
CARIBBEA N EXAMINA TIONS COUNCIL ADVANCEDPROFICIENCYEXAMINATION CHEMISTRY- UNIT2
l
PaperOl 90minutes (
15JULY2008(a.m.) )
READ THE FOLLOWING INSTRUCTIO NS CAREFULLY . 1.
This test consists of 45 items. You will have 90 minutes to answer them.
2.
In addition to this test booklet, you should have an answer sheet.
3.
Do not be concerned that the answer sheet provides spaces for more answers than there are items in this test.
4.
Each item in this test has four suggested answers lettered{A), (B), {q, (D). Read each item you are about to answer and decide which choice is best.
5.
On your answer sheet, find the number which corresponds to your item and shade the space having the same letter as the answer you have chosen. Look at the sample item below. Sample Item Whichofthefoll owingistheHIG HESTenergytra nsitioninanorga niccompound? (A) (B) (C) (D)
Sample Answer
n to a* n to 1t* cr to 0'* 1t to 1t*
The best answer to this item is "a to cr*", so answer space (C) has been shaded.
•
6.
Ifyou want to change your answer, erase it completely and fill in your new choice.
7.
Whenyouaretol d to be~ twn the page and work as quickly and as carefully as you can. Ifyou cannot answeranitem,o mititandgoonto thenextone. Yourscorewillb ethetotalnumbe rofcorrectansw ers.
8.
You may do any rough work in this booklet.
9.
Figures are not necessarily drawn to scale.
10.
The use ofnon-progranu nable calculators is allowed. DO NOT TURN TffiS PAGE UNTIL YOU ARE TOLD TO DO SO. Copyright© 2008 Caribbean Examinations Council. All rights reserved.
22212010/CAPE 2008
• AFFLXSEALHERE
•
-2-
1.
Which of the following is true for butanoic acid?
(A) (B)
(C) (D)
2.
Molecular formula
Empirical formula
C4Hs02
CH20
C4H602
C4Ha02 C 4H 8 0
3.
The compound which shows both cis-trans isomerism and optical isomerism is
"c
(A)
c
CH20
C2 H4 0 C 2 H 40
H
A hydrocarbon contains 87.8% carbon and 12.2o/o hydrogen by mass. Its empirical fonnulais (A) (B) (C) (D)
CH CH 2
H
H
/
c
H
/
/I" H
"' /
c
H
CJHs
Br
Cl
/
c
"'
/
/I"- H H
c
"
c
'H /I Br
H
"
H
H
H
"/ c
/I' H H
C-H
/
H
c
Cl
/
c
/
(D)
"'
H
H
'
(C)
C-H
/
H
H
" "
H
"c
C2H3
C-C-H
H
Cl
(B)
/
/
c
' /
H
C-H
'
H
GOONTOTHENEXTPAGE 222120 l O/CAPE2008
H
-3-
4.
The carbonyl group is NOT present in (A) (B) (C) (D)
5.
6.
aldehydes ketones alcohols carboxylic acids
Which ofthe following alcohols will NOT be oxidised by acidified potassium chromate (VI)? (A)
Which statement is true about C - C bonds? (A)
(B)
(C)
(D)
CH 20H
A double bond is made of a sigma bond and a pi bond. There is a higher electron density between the atoms in a single bond than in a double bond. The distance between the nuclei of the carbon atoms is shorter in single bonds than in double bonds. Single bonds are more reactive towards most reagents than double bonds.
(B)
I I
CH - C - H 3
OH H (C)
I I
CH -CH - C -OH 2
3
CH 3 CH 3 (D)
I I
CH- C - OH 3
CH 3
7.
Which of the following compounds is hydrolysed by water?
(A)
C2H 50H
(B)
C6H 5COOH
(C)
C 6H 5CH2 Cl
(D)
0
~- Cl
GOONTOTHENEXTPAGE 2221201 O/CAPE2008
-4-
8.
Ethanol can be formed by the following
At which ofthe carbon atoms in the molecule below is electrophilic attack MOST likely?
11.
reaction:
H The mechanism used is
(A) (B) (C) (D)
electrophilic addition electrophilic substitution nucleophilic addition nucleophilic substitution
(C)
~0
"c /
(D)
A\CH Br
~CH 3
\
2
""--.....
..____(A)
9.
Hydrogen cyanide adds to ethanal but not to ethene because (A)
(B) (C)
(D)
ethanal is more susceptible to electrophilic attack than ethene the addition product formed with ethene would be unstable ethanal is more susceptible to nucleophilic attack than ethene ethanal is more susceptible to free radical attack than ethene
(B)
12.
A compound gives a white precipitate when shaken with aqueous bromine. The compound could be
(A)
C2H4
(B) (C) (D)
C6H 50H C2H 50H
C2H 5COOH
CH 3
10.
Methylbenze ne,
~
can react to
13.
Which ofthe following would release a proton MOST readily? (A) (B) (C) (D)
produce
C~C~OH
C}\COOH C6H 50H
Cf\OH
Cl
14. Which reagent and conditions are MOST suitable for the reaction? (A)
(B) (C)
(D)
Chlorine with u.v. light Chlorine in the dark Chlorine withAICI3 Concentrate d HCl heated under
A possible use for the product formed by the polymerisati on ofpropene, C 3H 6, is as a (A) (B) (C) (D)
fuel liquid disinfectant plastic material
reflux
GOONTOTHENEXTPAGE 22212010/CAPE2008
-515.
Which of the following represents the repeating unit obtained from the addition polymerisation ofthe monomer, CHCl=CHC l? (A)
H
H
H
I
I
I
(A) (B) (C)
I
c-
I
I
I
I
Cl
Cl
Cl
Cl
(D)
Cl
H
I
I
-C-C-
(C)
I
I
Cl
H
H
H
I
I
I
I Cl
Cl
H
Cl
H
I
I
I
I
A student carries out the gravimetli.c analysis ofa soil sample taken from an area surrounding a garage. The soil sample is found to be contaminate d with Pb2+ ions. 100 cm3 of a solution obtained from the sample when mixed with 25 cm3 of 0.100 mol dm·3 HCl yields 0.010 g oflead chloride. [The relative formula mass oflead chloride is 278.2.]
C - C-
I
I
I
I
Cl
H
Cl
H
19. Item 16 refers to the following burette readings: 25.1, 16.
25.2,
24.9,
(D)
The balanced equation for the reaction between lead ions and hydrochloric acid is (A)
24.8
(B)
Pb (s) + 2HC1 (aq) ~ PbC12 (s) + H2(g) 2Pb (s)+2HCI (aq) ~2PbCl (s)+ ~(g)
The standard deviation ofthe readings is (A) (B) (C)
1.92x IO·' M 2.95 X 104 M 3.11 x 10·3 M 5.77x 10· 1 M
Items 19-20 refer to the following information.
Cl
-c-· c -
3 What is the concentratio n (mol dm- ) in an aqueous solution that contains 63.3g of 3 ~Fe(CN) 6 in 1.0 dm of solution? [The relative formula mass of~Fe(CN)6 is 3292.]
(A) (B) (C) (D)
-C-C-
(D)
Purity ofreagents Blowing the reagent out ofthe pipette tip Overshooting the calibration mark of the volumetric flask Adding excess water to the conical
flask 18.
(B)
Which of the following will NOT affect the accuracy ofthe results in a titrimetric analysis?
H
C-
-C-C-
17.
(C)
0.245 0.183 0.122 0.033
(D)
20.
Pb2+(aq)+ 2HC1 (aq) ~ PbCl2 (s) + 2H+(aq) Pb2+(aq) + 2HC1 (aq) ~ PbCI2 (aq) +2H+(aq)
What is the concentratio n of Pb2+ in the original solution?
(A) (B)
(C) (D)
3.60 X 10·5 mol dm·3 3.60 x 104 mol dm·3 5.40 x 104 mol clm·3 7.20 x 104 mol dm·3
GOONTOTHENEXTPAGE 222120 10/CAPE2008
-6-
Item 21 refers to the following regions ofthe
In which ofthe following processes is infrared spectroscopy MOST likely used?
I. II.
I. II. III.
III. IV.
21.
25.
electromagnetic spectrum. Visible light
X-ray Infrared Ultraviolet
(A) (B)
Which ofthe following is the correct order for increasing wavelength? (A) (B) (C) (D)
II, III, I, IV II, IV, I, III II, IV, III, I IV, II, I, III
Monitoring atmospheric pollution Breath-alcohol analysis
Quantitative analysis I only
(C)
II only I and II only
(D)
I and III only
Item 26 refers to the mass spectrograph below.
Q)
22.
Which two features BEST describe ultraviolet
radiation?
u
I
c:
10
'"0
c:
::J
..0
(B)
Short wavelength and high frequency Long wavelength and high energy
(C)
Short wavelength and low energy
(D)
Long wavelength and low frequency
(A)
10
<1J
0')
ta
c:
<1J
m
~
Q)
0..
m/e values
23.
Which of the following types of electronic transition would NOT produce absorption in the UV/VIS region ofthe spectrum? (A) (B) (C) (D)
24.
26.
Which ofthe following correctly identifies I, II and III above?
1t--)> 1t*
n
~
Base peak
1t*
0' ~ 1t*
Molecular ion
M+1
n~cr*
Item 24 refers to the diagram below which
(A) (B) (C)
represents the structure of a water molecule.
(D)
I II
II I
lll
II III
III II
I I
III
Which of the following would be exhibited
by the molecule? (A) (B) (C) (D)
Bending and stretching vibrations Asymmetrical stretching vibrations Bending vibrations Symmetrical stretching vibrations GOONTOTHE NEXTPAGE
2221201 O/CAPE2008
-727.
Which of the following statements reflect the advantages ofthin-layer chromatogra phy over paper chromatography?
I. II.
III.
Thin-layer chromatogra phy is slower than paper chromatograp hy. Thin-layer chromatogra phy may be made from different solids, thus a wide variety of mixtures can be separated by careful choice. Thin-layer chromatograp hy can be used for quickly selecting the best conditions for larger-scale phases. I and II only land ill only II and III only I, IT and III
(A)
(B) (C) (D)
Item 28 refers to the following chromatogra m which is obtained when a 1 : 1: 1 : 1 mixtur~e of ethanol, propan-1-ol, butan-1-ol and hexan-1-ol is analysed by gas-liquid chromatography.
I
n III IV
I Ethanol
II Propan -1- ol III Butan -1- ol IVHexan -1-ol
10
5
0
Retention time (min)
28.
Which compound is present in the highest concentration ? (A) (B) (C) (D)
Ethanol
Hexan -1- ol Propan- 1 - ol Butan- 1 - ol ·
GOONTOTHENEXTPAGE 2221201 O/CAPE2008
- 8Item 29 refers to the following boiling point composition curves for three mixtures.
I 29.
Which of the following CANNOT be completely separated by fra,:tional distillation? (A) (B) (C) (D)
30.
Ionly Ilonly I and II only II and Ill only
A solution of 10 g of a carboxyli c acid (weak acid) in 100 cm3 of water is shaken with 100 cm3 of ethoxyet hane. It is found that only 6.5 g ofthe acid remains in aqueous solution at equilibriu m. The partition coefficien t is
(A) (B) (C) (D)
31.
III
II
32.
(A) (B) (C)
0.054 0.54 5.4 54
(D)
rv.
Proximity to a potential workforc e Availab ility to a means of transportation Potential pollution of air, land and water Proximity to raw materials
(A) (B) (C) (D)
I, II and III only I, II and IV only r, III and IV only £, II, III and IV
III.
AP+(l) + 3e· ~AI (l) AP+ (1) + 2e· ~AI (s) AP+ (aq) + 2e· ~ AI+(s) 2AP+ (l) + 6e· ~ Al 2 (g)
Item 33 refers to the following fractions of crude oil
Which ofthe following are importan t factors to consider in determin ing the location of a factory?
I. II.
In the electrolys is of molten alumina, Al20 3, the reaction at the cathode is BEST represent ed by
I. II.
Diesel Petrol
III.
Refmery gas Kerosene
IV. 33.
The correct order in terms of increasi ng boiling point is (A) (B) (C) (D)
I, II, III, IV III, l, II, IV
III, II, I, IV lll, II, IV, I
GOONTOTHENEXTPAGE 222120 l O/CAPE2008
-934.
In the Haber Process, a maximum yield of ammonia can be achieved by decreasing (A) (B) (C) (D)
35.
36.
39.
Water Energy Oxygen Enzymes
III.
Stimulates the central nervous system May cause liver disease Reduces manual dexterity
(A) (B) (C) (D)
land II only I and III only II and III only I, II and III
In the electrolys is of brine using the diaphragm cell, two by-produc ts of this process are (A) (B) (C) (D)
hydrogen and sodium hydroxide chlorine and sodium mercury and hydrogen chlorine and oxygen
In the Contact Process, why is sulphur trioxide NOT directly dissolved in water to produce concentrated sulphuric acid? (A) (B) (C) (D)
It is insoluble in water. The reaction is highly exothermic. It is extremely toxic. It is colourless and odourless.
There are four reactions that take place during the Contact Process. The first two reactions are represented as follows:
s (s) + 02 (g) -4 so2 (g) 2S02 (g) + 0 2 (g) ~ S0 3 (g) Which of the following are the other two reactions?
Which ofthe following are consequen ces of the consumption ofalcohol? I. II.
37.
temperatur e catalyst pressure particle size
During fermentati on to produce ethanol, which ofthe following is NOT used to break down glucose? (A) (B) (C) (D)
38.
IV.
S03 (g) + H 2S04 (I)~ H 2 S 20 7 (1) H 20 (I)+ S03 (g) ~ H 2S04 (aq) H2 S2 0 7 (1) + H 2 0 {1) ~ 2H2 S04 (1) HzO (1) + 802 (g)~ RzS03 (aq)
(A) (B) (C) (D)
I and II only I and III only II and IV only III and IV only
I.
II. Ill.
40.
The major reservoir for the water cycle is (A) (B) (C) (D)
41.
oceans glacial ice freshwater bodies atmospheri c water vapour
The presence of phosphate ions (POt) can be detected using (A) (B) (C) (D)
ammonium molybdate sodium thiosulphate potassium thiocyanate solution potassium hexacyano ferrate(II) solution
GOONTOTHENEXTPAGE 222120 1O/CAPE2008
- 10-
42.
The ozone layer found high in the stratosphere (A) (B)
(C) (D)
43.
44.
is toxic to plants reacts with atmospheric pollutants to form smog protects against the sun's harmful UVrays is an environmen tal hazard as it readily disintegrates fabric and rubber
I.
Which of the following may be a result of light-induced reaction ofpollutants in the air? I.
II. III. (A) (B) (C) (D)
Global wanning Photochemical smog Greenhouse effect
I only II only I and III only I, II and III
Nitrogen monoxide, NO, is responsible for the destruction ofozone in the stratosphere. How can N 0 be generated in the atmosphere?
45.
Combustion of fossil fuels
II. III.
Lightning discharge
(A) (B) (C) (D)
I and II only I and III only II and III only I, II and III
Reduction ofN02 by S02, both of which are present in the atmosphere
Which of the following is a disadvantage of recycling plastic? (A) (B)
(C) (D)
Decreased masses are sentto landfill. Plastics are generally of low biodegradability. More toxic fumes are released relative to incineration. Recycling minimises wastage of materials.
IF YOU FINISH BEFORE TIME IS CALLED, CHECK YOUR WORK ON TillS TEST.
2221201 O/CAPE2008
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CANDIDATE'S RECEIPT INSTRUCTIONS TO CANDIDATE: 1.
FiD in all the information requested clearly and legibly.
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2.
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3.
Keep it in a safe place until you have received your results.
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Signature: Supervisor/lnvigilator. Date:
I
I I I.
~LiMP. ""'~
.
~
·
. .._. ·
.
·~
•·-·-·
_
., ..,
-k-
•
1.
.
VolatHity of organic compounds depends on the strength of. the ~qk_~:glar_forc~s present. Which compound below woul4 be
H.
l
the MOST volatile? -
H
==·~
H H
I
I l
H-C-C-C-C -H
I \ I l H H \ H
CH. CR,CHzOH
(A)
cr(cH~C£\CR3
(B)
C~ CH(CH,)CHJ CH~CH 2 CH2 COOH
.--<{C)
(p)'
H-C.:...H \
H-C:-H
I H
The IUPAC name for the structure is
l.
<-1i} (B) _(C) (D)
3.
i - ethyl butane 3 - ethyl butane 2 -methyl pentane 3 - methyl pentane
Which ofthe following is a pair cif optical isomers?
•
CH:i
Cfh
I
l
HO-C-CH3
CH3 -C-OR 1 CH:
l CH3
H \ HO-C-C1H:s
H
I _,/(13)
C2Hs- C- OH
I
l
CH3
CH:;
(C)
H
H H
H
.I
I !
I
H-C-C-C--C -CH
I
I
1
I
H H H H CH3H
\ (D)
.
1
H-C-C-OH
I
I
CH3H
H
H H
H
1 I I I HO-C-C-C- C-H I I I l
H H H H H CHs
l
l .
HO-C-C-CH J
1 H
I
CH~
GO ON TO THE NE:X:! PAGE
•
t
fi
l=
-~-
--
. ·-·· -~::-
--
..
·-·- .
..
-··~
-·-
- ..,
•
~-
4.
S¥ttich 'of the followin..g 1s ~~! !Ue of addition poiym.erization? Only one type of polymer is form~. The molecular mass of the polymer is a multiple of the · monomer unit.-"'· . . The polymer is readily hydrolysed to the monomer..
(A)
(Bj (~)
The physical and chemical properties of the polymer are different from those of the monomer.
(J?)
-~refers to the adojtion polymer represented by the ·
following chain sequence. :--"'---·.. -...· --·
--~·
C2Hs H ~ ~1 H
CHJ H
I
I
.I
I
I
'H
ClBr
1
I
·.. ··.·_::;;·.:
I
I
-:--C-C-C-C_. :C-C-
··~ .. .
I
I
!
H
H
CH3
·--------
I
\
l
Tile mrinom~rs are MOST likely
5.
.CH3 (A)
C2 H 5
H
/
""c=c"a
and
H/
·CH (B)
/
/
"
c=c
/"~).
(D)
and
.0
/
'-... c=c'\... /
Cl' H
/
""/ c==c'-...
B
H
SHs
anq
'<..
/
•
I,
j-~
'\...
C2HS·
H
Cl
/
H
H
'-...~
"c == c
B
/
/
-f Br
H
c==c
"
H
H
CH3
Br
H
Cl
~s / _,.. c=c '-...
'-...
/
H
/
c=c
"-
H
\
and ....
CH'3
·.z• •
/
Br
H
GOONTOTHENEXT PAGE
. ·~-·
;.._.
t:j
.~
l
- 4-
•
Item 9 refers to the following information ..
can be produced fjom ethane l, 2- dial (RO - C:H.,:. CH., - OH) 2-nd benzene l, 4 dicarboxylic acid •
Terylene
6.
(HOOC
Etbene is normally susceptfnle to elecrrophiiic attack, but it is made attractive to nudeophiles· by complexing it ~v.ith Pd2+ catalyst ir1 the.
~COOR).
Wacker process:
Il
t r
\Vhich of the foliowing -characteristics would terylene MOST likely possess? (A)
lt has the same empirical formu1a
as
its monomers.
(B)
One of its monomers contains the C = C functional gro~ -. ·_
(C)
lt is the only product obtained when its monomers react. 1t can be. hydro1ysed by aque·ous sodium hydroxide.
(D) 7.
9'.
{B)
(C) m~ ~
The
l.
II.
UI.
Reagent which attacks electron deficient sites in molecu1es
----(A) (B)
(C)
•
cPJ
The equation for the formation of' the ._ . anaesthetic, CF3CHBrCl, is
> CF.CI:-ffirCl.
The type of reaction occuring is
"'' ..(..B) (C) (D)
2
:
CH. 2 cgmpiex c::creases
electron density in the double bend.
Lewis acid Lewis base Species wirl_l a lone pair
Br.,
CH
PdH
Which ofthe following statements does tKl.T .. _,: - '. ,: ' ~ · · · ... · . descn'be a nucleophi1e?
. -cf.:.)'
Which. of the following opt:lons characterize this mechanism?
10.
The 1t electrons of ~:fuen~ occupy . vacant orbitals in Pd.2-!-. The 1t electrons are no longer available and their removal makes • ethene positively charged..
land II only Iandillonly TI and III only l,IIandiD
Vl'hich of the following compounds is both an alkene and an ester.?
{Aj
free radical· substitution elecirophilic substitution nucleophilic substitution
H _o'·,'. H ....._, ..;-:;' .-·-" ··-·-........ jC-0-:-CH:z.-CH ::::::::C;
nucle6philicadditi on
'-····
(C)
·~.. -.
'CH3
H .-·' ...::::,-.C-CH 2 -CH::=C .r 'CH: H/ 0
(D)
GO ON TO TH:E NEXT PAGE 0221201 O/CAPE2008
•
I
.. -~ ·- . I
t
-5-
11.
The complete reaction ofphenol wrJl aqueous bromine is characterised by a
- 13.
white precipitate, a brown solution arid an.antiseptic smell brown precipitate, a colourless
(A) (B)
.solution and a sweet smell ·
. (C)
whiteprecipitate, a colourless sob.Ition . and an antiseptic smelt
(D)
brown precf?itate, a brovvn solution an~ a. sweet smell
(A)
l
H (A}
©(NO,
and
CH 3
and
CH3-C-CH3
I
(B)
© l
Nq
0-CN
I
:
and
. . ~J
I
l i
©Jl
When propanone reacts with hydrogen cyanide, the fonnula of the product is
i i
!
CH 3 NO I
CH
(B)
12.
•
Which two products are forme-d in approximate ly equai amounts when met."'lylbenzene is tre~d with a mixr.n:e of concentrated HI. .~O. and concentrated . ~SO,?
CHJ-C-CH l-CN
ll
(D)
0 H
I (C)
...
#.
,';0~1
CH3-C-CHz CN
•
-~ refei'S to the compounds P•. Q. R
I
OH
and S, whose structures are given below.
CN
P: Q:
I CH~-C-CH)
R.: S:
I
0-H
14.
G~(C~)4CH:.PH ~ C~(Ct4) 3 C~COOH I CJ:i.;{C~)3CHCICOOH
&
The ·correo;t sequence of the compounds abov.e in order of DECREASIN G acid strength is ~ Q, s·~ P Q. ~ p {C~ - --P,-S, Q, R (D} ·---···S~ ~ Q. P
:·.\~) (B)
s,
...
GO ON TO THEN"'t:.XT PAGE [;
I --
~·
-·-----~
t:_
--------- --.
I
.or J(
~
l;. ~
/
•
/ f
Item 15 refer.s to the foHo"'Ning structure of
6-tO
.>.C.
tyrosine.
. wnich of the follo'VI-i.ng graphs mustrates the titration of diiute suphu.--ic acid with potassium
hydroxide solui:ionf
.
CO~B
.-
(A)
1
pH1I4 - u '
H N-C-H :z
I
7-
~·
1
Yol of !1 zSO4 14f
(B)
OR
pEl
I
71-/
The pH of tyrosine is MOST likely
15.
(A)
_.(:J3)· (C) (D)
2.1 5.6 ~ ,...;?.. :/·7.0 9.0
:< ;:.
(C) t.'
Which of the following pieces of apparatus possesses. the HIGHEST degree of
16.
uncertainty in measurement?
- fli.r (B)
•
Beaker
Burette
(C)
Pipette
(D)
Measuring cyl~der
Which ofthe following is NOT a pmperty of a primary standard'?
17.
.
,.;- .. ·;.;(;~..)-·
(B) (C) (D)
Low relative molecular mass Very soluble in ·water v
Obtainable in a pure ~te ~'( Docs not undergo hydrolysis
. 19.
Solution A, 10 em~ of ~SO," is placed in 100 ml volumetric flask and made up to the mark with distilled water. 25 em;; of this solution is used to completely neutralise 20.05 cm3 ofO.Ol mol dm·3 solution ofNaOH. What is the concentration of solution A? 1. {) x 10'3 mol 2.0 x 10-'~ mol 4.0 x lQ-4 mol 4.0 x 10·~ mol
(A) (B) ~~
(D)
dm- 3
dm·3 dm·3
dm·•
. !
·,.
-
_;_,
...
, ·:-""-..-
....
~
-=')..:.-
'"";
./
GO ON TO THE NEXT PAGE 117?1 /(] J.O/('A PF.7011R
•
-··
: -720.
(A)
Gravimetric_ analysis is a purely
(B)
quantitative method. --Gravi~tric analysis never involves
E0.401 ~ 0.30r
a
(C)
~ 0.20··l-·-----------
of solid. The analyte can be identified after precipitation and isolation have
occurred.
In an electronic transition in the UV/visible region of the spectrum. a wavelength of • - .:;; 450 ri!iiiis absorbed. J :~ : '--'
:._.
..::.. ,;..1
r 1
The energy of ~e corresponding photon (in Joules) is
(A)
X
}0"34 X 3
4.50 x
X
. 22. ·
•.• 'j/)\
-
l:-:::.
'(B).
'I:::J ...~(
.f ·-
'j.
l¢)
X
X
10"34
4.50
/
X
(Atomic mass of X= 172 g mol-') A'-'""
:{A)
~)
·
!0 8
:r,
2.91 x l
(C)
s.GIO x Hr3 ~ofdm·3
{D)
8.61 x
10-~
mol dm-3
io-s 7
X
3
X
Hexane wilL not absorb light in the lN/visible
regwnof thespectrum because there is a
A)
10"
6.63 x 10"34 x 3 x. 108
6.63
'\l.That is the concenii'ati.on in mol d.m-3 of an unkno~ solution of X~~+(aq) which has an absorbance~ value of 0 .20'1
' --·-
f- =- \1
l3. 4.50
8 4 .. 6 [XIi+l in. ppm
2
';j'· ': . {- ~-
·'\ ' ;
•:..:;t •,_.
Planck constant (h) = 6.63 x l 0"34 J s Velocity oftight {E)~ 3.00 X~~ m ~I
66.3
\.
0.10
The amount of ana.lyte lost due to solvation is assumed to be negligible.
21.
·
in the solution.
the removal of vola.tJ.le components
.·.
}0 8
{B)
9
10"
•
-~- ,-..
large difference in energy between antibonding the bonding' orbitals large differet,lce in energy between the bonding and non-bonding
and
.
~
6.63
•
Item 22 refers to the greph beio~ yihich. . shows the absorption calibration cur-Ve for X',.;. .
me
following statements about \Vhich of gravimetric analysis is NOT true?
small difference in energy between the bonding and non-bonding
10-34 X 3 xl0 8 4. .50 X 10-i
X
. orbitais__ _
(D)
small difference in energy betwe~
¢e bonding and antibonding orb~
_;,_-
·:_; ..
_-,_.
· .........
_·.-
c.-_,.-\ I:'>
GOONrOTHENEXTPAGE
-=- -
H. "r: ~
.. - ... -·.--·r·-· -· -·t;
0
- il -
·which of the following pairs do NOT absorb infrared radiation?
•
l. II. LTI. IV.
25.
26.
wnich of the fo1lo'.~ing spectra shovl:; a possib~e fragmentation pattern of CP'":2Ci1 ?
H::.O E.J'"ld HI F~
and Cl2
~and
HBr
{A)
CH4 and Br2
I and Ill
(A) (B) (C)
land IV II and III
_(D}
II and IV
An u~own organic compound of molecular
o!
mass 44 g is analysed using infrared. The bonds-are found at 1700 em·' and 2800 cm·i. .
(B)
j~Lill
a{JJ..£.
A.t..Lll.-\
The compound is MOST likeiy
-(A):·-eth al!dtetha.noic acid (B) .:=(C):':(D)·
•.
·.-.
.
83
85
8i mle
(C)
'·.
"""'!
.:...
__
~::.
·ethanal .carbim dioxide . -·· ._,. ,.··
· ..... .·\ ?- r·_. ;_.
c.;
~.gC.l1'
.,,
--
•
l I~ 1
83
85
87
mfe
J.:
~-
(D)
~
-
...
, '.:
GO ON TO THE NEXT PAGE 0221201 O/CAPE2008
•
.. ··---··--~------- ·t··
-9Item 27 refers to the folloVIring information.
29·.
•
"Which of the following is NOTa visualising agent in chromatography?. -.
Sample X is a mixture of substances. X was separated into its components using paper
(A)
chromatography simultaneously with individual samples of e, f, g and h. The
~B7
Cellulose
(C) _ (D)-
Ultraviolet light ND:ihydrin
chromatograph produced is shown below.
.t
30 ..
@
it
Iodine
"Which of the following statements about
partition coefficient mey be ~?
@
l
@
. I. 1I.
@
..
,_
0
@
m.
c,
It does not vary with temperature.. ; The solute has to be in the same molecular state in both solvents for it to be a constant. ·The two solutions have to be concentrated for it to be a constant.
Sample X
e
g
f
h (A) ~
(C)
which substances are MOST l.ik~ly present
27.
~ 1
(B) (C) (D)
(D)
.
·in Sample X? e,f,g e, t: h e, g, h e,.f, & h
31.
Along with silicon dioxide, which of the
impurities ofbauxite?
A student is asked tO determine the value of 1 n' in the hydrated salt, ¥zSO".n~O . The masses of~SO 4 and water of cr.jstalliza.tion in th.e salt are 5.65 g and 2.65 g respectively. [Assume Ar ofM = 8~
The value of'n' is MOST likely
f
l
(A) (B)
2 3
(C)
5
.....(D)
7
•
following compounds constitutes the main
(A)
28.
I only -H-enly Iimdnonly I, ll and "in .
-· .. .. -~·
~
(C) (D)
32.
lron(TI) oxide Iron(lll) oxide
Carhondioxide Carbon monoXide
In the fractional distillation of crude oil, the different fractions are separated based on their (A) (B)
soiubilif:y
...{¢.}
viscosity voJatility
(D)
polarity
.GO ON TO THE NEXT PAGE
mZl2Qil 0/CA PE2008
-. .
...... ~·.
~~-
-~
.•.. ·--
Ji
..--- ··-::- ..
E
, '
•..
-1033.
In the Bosch-Habc:r process, N2 and H2 can be obtained from X and Y respectively. Which of the following pairs BEST 4escribes these
36.
sources?
y
X
(A) s about (B)
Ammonium salts Amm-onium
salu
(C)
aturc.
(D)
to be
be a
34.
·~
I.D.
IV. (A) _.CB) (C) (D)
of the main
• ].the don
gJ{
inhibit the cxid8tion of unsaturated fats help to enhance the colour of food improve the flavouroffood
Air
Naphtha
Air
Ammonium
37:
salts
SolVents
Which of the following plastics are biodegradable?
38.
Sodium chloride Polyvinylchlorido ChlorotluoJ'OCBI'bons
(A)
Polytbenc tcr"eph1halatc
(B)
w;
Low density polyetbcnc
Poly. (3 - hydroxybU1anoic acid)
(D)
Polyvinylchloride
Which pfthc following arc productd whe11 a hydrocarbon widcrgoes~leteeombu$tion? L
n.
I and II I .and III II &nd.lll II and IV
III. N.
(A) ~,
35 •
In the production of itllpburic·lieid by the Contaet process the folloWing tiothennic reaction takes pisco:· 2S02(g) + Oz(g) .v,~s.42~C. Zatm
39.· I
2SO,(g)
R.
In. (A) (B) ,·
(.G{ (D)
Ionly I and ll only
II and m on1y 1, I.I and III
I and II only 1 and m only
(C)
II~dmonly
m.~~ IV ~ly
.
Which of1btfl6~~~ ..-.? . - ..
n. In. IV.
Low pressure Excess OJcygeil , Low tcmperatur'C
Water Carbon monoxide Carbon dioXide Oxygen
I. ·Which of the followiqg eondJ.tioJIS would favour the forward reaction? I.
dchydrition
Air
ofwhicb TWO of the folJowilig:iJJdustn.J prodpcts ~ cblorinc most 'Yidely used'? I.
help to prcs¢rvc the food by
•(C) (D)
Naohtha
Forth~ manufacture
u.
(A:)
,•,
c same
entsfor
Ci:xnpounds of sulphur suelh .as stdpbites are used as food additives. This is~ they
v.
(A)
..iB} (C) (D)
;-_.
NitrOgen
CadJon ~oxide
caiboft dao'Xi•
M~
Sulphwdioxldc
ll and m only Ill and IV only Ill and V only ~ U and IV only
• ------------------------·-~-
~
·'~~ptW''
<
-
;{f ''
- 11 Item 40 refers to the schematic diagram .
Chlorine radicals are formed in preference to fluoffi,e radicals when ch1orofluorocarbon.s are impacted by nLtrav1olet radiation. This occurs in the upper atmosphere because
43.
below. Nitroeen
Rain and
fixation
lightning
_.(A). ' the bond enthalpy ofthe C- Cl bond (340 kJ moi-1) is less than that of the C - F bond (484 kJ mol-l)
LTi'l::rifYing
~~acteria
v
(B)
the bond enthalpy ofthe C- Cl bond corresponds to the energy cfthe
(C)
the chlorine radical is more reactive than the fluorine radical the fluorine radical is more reactive tha..'1. the chlorine radical
~ Plants
uitraviolet:radistion
(D)
40.
W wouid MOST likely be (A)~
(B) ~e)
(D)
41.
«.
---:fP~ 4.2.
N"rtrates and ammonia Phosphates and sulphatcs Sulphates and carbonates Phosphates and nitrates
(A)
carbon monoxide and nitrogen dioxide
(B)
carbon monoxide and nitrogen
(C)
hydrocarbons and nitrogen monoxide ni1rogen dioxide hydrocarbons
mOtlOXkie
muth
algalEutrophication results in too· growth in rivers or ponds, due to fertilizer run-off.
(A) (B) (C)
The primary chemical pollutants involved in the formation ofphotochemical smog are
nitrates nitrites ·NH 3 and· ammonium salts'\-. nitric(V) acid ·~:.
Which of the following pairs is responsible for this gro·wth?
.
:..CD~/ -
45.
••
J
and
Sul.phur dioxide~ produced when coal is used as a fuel, can be BEST removed from tbe waste gas stream by (A) (B) (C), (P)~
water sodium su1pbate sodimn carbariate calcium carbonate·
Ozone in the troposphere has NOT been Iinkedto · (A) (B) -(C)
-~~PJ=·
dying forests greenhouse effect asthma attacks bleaching of coral reefs .
IF YOU FINISH BEFORE 'I'!Mr:E IS CALLED~ CHECK YOUR WOlRK ON THIS TEST.
.
.
0221201 O/CAPE2008 .
•
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NS CAREFULLy \ 1.
In addition to this test booklet, y·ou should
2.
Each item in this test has four suggested ~nc:Uh"•I"C!]ettered (A), (B), (c), q)). Read_.; e'ath item:you~re~·.: about to answer and decide which choice is
.
.
3.
On your answer sheet, find the numberwh · the same letter as the answer you have ch
orresponds ~o yo.ur iterri arid s~age the space having · · . Look ~it:ih€{~~TR)~;f~~~··~~~ow.
Sample Item . Whichofthefollowingisthehig hestenergy
sition in anorganic com po~nd?:
. Sample Answer
n to cr*
(A) (B)
n to 1t*
(C) (D)
1t 'tO 1t*
cr
'tO
.
.
.
. :.@ . ®:e.@
a*
. ~... . :
.
.
.
The best answer to this item is "a 'tO a*", so ~tnc~-uvf~rspace (C) has been black~ned.
4."
Ifyouwanttochangey~ura~swer,be.silreto
youroldanswerco~pletely and fill in your new
choice.
5.
·as quickly and as c~refully as you can. Ifyou cannot When you are told to begin, tu~ the.pageand You can come back to the harder item later:. Your answer an item, omit itandgoonto the next score will be the total number ofcorre6t<111,"\VV.ul
6.
You may do any rough work in this booklet.
7.
Figures are not nece~sariJy drawn to scale.
8.
The use ofnon-programmable calcu]ators is
9.
Thistestconsistsof45 items. You will have
I 0.
Do not be concerned that the answer sheet pro ·des spaces for more answers than there are items in this test.
YOU ARE.,TOL:P TO DO SO.
DO NOT TURN THIS PAGE
Copy.right ©2005 Caribbe All rights
-
_ ...........__. .....
.
....3
minutestoanswedhem.
R!i.--
......
1.
.· ,~., . ;,;;~~~~~~::~~\dL ~',~;;;:.; · . . .~:-~:~: :· ·",~; ·: - ·~·:;r::~;~<::~!~;~~t::!:~~!::JI:~~:~ ~~ .
r.
·~
The rate equation for a reactio~l" -is~given-bj:~·;~·:.:;: '"3",.:":-: ~:·/(li~::iitt~·-equation for the reaction between
::er:ekc::mnt,
k,
..
•
·. ~- : : : ... . :. :. ~ .. . ·.. riiol dm"1. ati(fstconds respectively, the units
increases as tempeuiture increases .. {. . ·.. . .. ::bft.be nite,constant, k, would be decreases as temper-~ture in~r~a~es. · · · · ·· ·. · ·' · · ·" · ·· . · . - . ' mol dm-3 s' ·: (ii\.) increases as concentration.increit.Sbs · "·. : (0) moP dm-6 s 1 .(B) decreases as concentration increases (D) dm6 mol-2 s-' (C) moP dm9 s 1 (D) Which of the follo~ing graphs refers to a zero order reaction?
(A)
(B}
•
2.
0
~
• ••
.
: . i '~. ..
(A)
.•.•
.
-· .-·t
...
; .:_' t_
: .."!
Rate -: ••· :
:.
~:~-:
. :-."' ••• •
:
Concentration ·· · ...... . .; .: -:- :'.. - .
(B) ~
.
.:·
.. :
. •.
.:
~
Concentration (C)
Rate · .....
Concentration· _,.... /
(D)
Rate
Concentration GOONIO+HENEXTPAG~ ··-.:OJ._.,.._ .& -~· ::·~a .......... ·.:..· '·
I!
-3• 4.
...
5. Which of the following graphs represents t e n wh di~tribut_ion ofthe.Boltzrruirjp new shape . the temperature ·is.chan.ge'd f'rom'T/to a'lo\v ·f --. .. _. . tempera~re, T2 ?
For.the equilib~ium,··
--~ (~) ~-o~{~)---~-iNq(~j~~-H~+(89.k 1 moi- 1
2
which curv~· ~l;ow~:how lncrea5tng the total · .- .. -.· . . p·~~~sur~-- .o( :.tl)e sys_t~~-.:~ffects th~ yield of the ·product?
(A)
No. of molecules
(D)
with a particu~ar 0/ 0
energy
. :.·}-·:Yield:
~~~~~~~---~)
Kinetic energy
----(A) ··. "Par:ameter increase
(B) No. of molecules with a
particular
energy
.. Kinetic_ energy
.
~
(C)
·.
,;·.'"
':
No. of molecules with a
particular energy _lQn~t~c
"i
en_ergy
Tt
(D) No. of _ ~olecules
I
with a particular energy
Kinetic energy
GOONTOTHENEXTPAGE 022 120 l 0/C 2007
-------..
.....
~
.w
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· Z;a;;# i ·· -
'
.
·- 4- ... ··;·. ·, ...· ·..:· ... :, . -~ .·· .·: :-.. :· .. . .... ; ,;.:.'·.·: :·t·~,;·':>:~·_:;;t· ....~.;·:: :· ·· .. :. ·; ·.." . .. . . e_potenti~ls ofchl~ti e, dich~om.~tC? ~:nd:it9.~.(III) iP~~-;;t.~~ a~ fol!6~~: .
~ ref~rs to the follo~i_ng _information.' -~·. The standard electro~ .
.·
.
.
:
.~
i •
..· ... - . .
.
.·
~
•
-
..
··.
·:-:
.:
1.36V.
+0.77V . .
;
:_: :.
_.,·.· ·..
~
-. :· . • •
•· i:
Which ofthe foU~wing eq~ations could re esent a feasible reacti6n?
6.
(A)
-· i
.....
•.
·- ..
::.· ·... :;
(B)
2Fe ~(~q) + 2~~-~~q) ~ C1 2(g) + 2
{C)
2 Cr20 72- (aq) + 6Fel+(aq~ + 14~+(a ) --+ 2Cr+(a q) + 7H/>(I)_+ 6 Fe +{aq)
3
3C~(g) +. cr~o~z-(aq).:t-)4H~(aq) i-:;.Y> ·
(D)
•
'
•
•'
I
~
•
..
, ' ::"): :.
·:·~?:
•. f·- .,.. ·' ·,· • i ;'".-·z~ '•I',•
•
:~; ~-:
o'
•··
..
base? In which of the reactions below does ammo ia ~ha~e as a ~ronst~~ ~---~~ry
7.
IV.
+ HCI ~ NH4CI 2NH, + 3Cu0 ~ 3Cu _+3~0 + N NH3 . + C~COOH ~ NH4 + + C}\ 2 Zn 2+ + 4~ -+ _[Zn ~)4 ] +
(A) (B) (C) (D)
I and III only I and IV only II and III only II and IV only
I.
£: ••
.. .:
·-
N~
.
II. III.
oo.. .~ _:: :: ·-~ :... --:.·=·:_.--
.
:'
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.
;
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·.. :.:·-
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-: ---·
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E GOO~IOTHENEXTPAG __:. . . .·.:. . :.·
~~-'":'
·-=-=====~.i54!F~g:..;;.!:j:·
..
- 58.
.:
_:.Whiph
Whic~ of the· foi.Jo~iqg·_.il~di~ator~ would
~
II. III.
· Methyl yellow Bromocresol green ~h~nolp~~alein :.:
(A)
. Ilonly
L '\.
.: buffer so1~tion? ·.
_[H+J.~-.Ka·[Acid] [Salt]
. ·: (B)
2.9-4.0 3.8- 5.4 ·. 8:2- 10.0
·
Ka [Acid] (fi~r= .
·. (A)
pH range
Indicator
~~:n.~~H9.n. wjll_ giye a . v.~J~.~ for t.he
·· ·hyd~~ge~-f~O.~.o?c~~~-{~HoP~.·(~~)in an acidic
produce a sharp. colour change in· tile titration of a stro~g acid against a ~t~~~g base?
[IYJ = R:_a rAc,i~l, .
(y)
.
.[ SaltJ .
.
.
-:•.
. (D) . . . [H+] ·= K LQruti . .. a . . [ACid] : ·• ·
.
I a~d II.qnly :,·
(B) (C)
II and in only . I, I1 and Ill
(D)
•\
Which::of ~he . _fello~ing statements is ·true
12.
?_. . abou(K • . Jp. • .
9.
-~ · ·
s61uti6n? ·I.
(B)
.1
(C)
i
•!;
.·(B)
(D)
Can a~t as ·a cataJyst in .
-
.·
. . ·. .
.
-
At a given temperature, K,
.·Ute.K;p of.an:ionic solid indicates the ·relative concentration .of ions that
(C)
·· d·.~eaction -· . . ·......
. (D)
. ~.
· · · · :~oltition. ':· · As _te_Jilp~rature changes~ the K,P of
. : : a_n(ip!JiC sol_i~ re~a~ns th.e same. . T.h~ K,P value of an ionic soli~ can '·.. :.1:?<1 obtained before s~turation point
· · · ~ ~ :;-'iS achieVed. ~
10.
:~ l
1
Wh~~h of the following does NOT describe a .prop~rty of the buffering ~ction ·o·f mixture of ammonium chlorid_e and aqueo~. s ammonia? ·
a
(A) (B)
ions.
..·
-
.. ~~~~ti~n ·~n·~~ :~ :2~-.
~onil,1m ions r~.a~t wi~li hydroxide
(D)
tons. Ammonium chloride djssoc·ates
·
·
··t· Sn
2
+
is E 6
= +0 .15V.
';__ ·. · ·-: B~~e.d .on tP:is infonnation ONLY, which of · . the foll<:)wing statements would be true?
.
(C)
· ·· ·
.. :The sia~dar~' :elec·trode potent.ial for the
J~.·-
· Ammoni~ molecules are basic. hydrogen Chloride iops re~ct with ... -
is the
. . fo!Jrl :a .pr~cipit~te i~ a .saturated
· Alters' the pH· of a. sol.1:1tion to the · · ·· desired pH~ Does not. change in pH on ·addition ~fla.rge amouf!ts of aci4. or alkali
'
·
maximum amount of ionfc solid · ; . ·:. . : ·:4issplved in a.$aturat~4 solution .
and. its corresponding salt
.
.i
·
Normally c~msis;ts of :;t weak aciq
(A)
l
i
(A)·
Which of the following is: true about a buffer
• 00
-_.
:
•
I•
1 ._ _. ·~ }~ ": :• .··. •: .:;•"
I.·· · ·.Tin'is a strong reducing agent. Tin produces many stable c·ompounds
II.--
in the +2 state.
C
·
III.
Sn.4+ can oQ:itiize Cu 2+.
IV.
The E 8 Sn 4+/Sn2+ is generated using a standard hydrogen e_lectrode.
(A) (B) (C)
I and _II only II and III only I and Illonly IVonly
(D)
GO ON TO THE NEXT PAGE . ·-
r.'l'11 ")()I {)/f"'}()()_l
-·~-
---¥#W: -
-·.
~
-
=~
-6 -.. 14.
Which. two eled~odes below wilJ-f~rn1 a ce11
with the latgesre:m.f?_··.;. ·:·
I.
Br2
II.
zn-z+
III.
... :
.. ··E·IV
2e- ~.2 ~(
+1..09
+ 2e-: :;:zn! :_
~.:.:0.76
-:
MnO+ sfi+ +: se-· -t~ Mn 2++ .·4 F~3 +
.. (A)
·.
...·< .... ·. :·:;,
4H 0
.:..·
2
·.
·+ 1.52
,;
_: ~
... ~- .· .:
..
.· ~
.
....
:
IV.
;_;' . · Items 16-:and ·:17-.i tefeFto··the graphs b¢low
:· . . :·. '--~-- which:.~~ovi trends di.splayed· by elements in · ._Period.J .....:· '::'.-'>< ·.<: ,.. .=-:·'_" ··:
+. e- ·-4 Fe2 +
+0.77
~
·:(·
...
~
{A) (B) (C) (D)
I and III imly land IV only··. II and III only II and IV only
.. ·-··
I
p:·
s
Cl
p
s
CJ
P
S
CJ
P
S
Cl
(B)
..
15.
The· s·tandard electrode potentials dichromate and iodide·iu-e:' .: r · 1/2 Cr20/-. (aq)"+)~~~~q) + Je-
:-fo •
: •• !
:? Crl~(aq
.+ 7/2 H 2 0 ~ +1.33V .·
...
. , ··.-_ccr···
I2(aq) + 2e- ~ 2I-(aq)_-~ ~0.54V · From this it can b~ deduced that .....
.-: :!•"
(A) (B)
(C) (D)
acidified dichromate ..ions would oxidise iodide ions. to iodine electi-~ns·. w-o~-ic(fJ~w' from t'h~· dichromate half cell" tcrthe iodine half cell if the two are connected iodin~ would o~idise c~nmtium (Ill) ions to dichromate·. .· _; combining both. half -~~ns· would produce a __c~IJ potenti~i of l.87V
...... .
;
.. ~ ~ : . ·.. .
(D) -.. ~
...
. .. . .:_..i~ .. -.~:~. :... ~. _.;. ~-·.
.•
. ··-: . ';: t . -~- ...: . -:.::_:,; ~ •. .·
.,:~
Na Mg AI
Si
. Match each of the items, below with one of the options above. Each qption may be used once, more than once or not at all.
i
16.
Ionic radius
17.
Melting point
·
-7 -. Items ·18 and 19 refer to _tht?. follow ng : · .· ~oxidation states. (A)
+1
f 1
(~)
.i
(C) (D)
+3 +6 . +7
I
/
~
2~ ... -·.,\WJ!qnpf)b~ foJlow.ing q~jd.e& of~leme.nts in
r? q~c in_characte t.Vi$ ~h~ .LEASTi~_i Oro~p .· . ····.. . . . . . . ·.
(A)::~-_. :··l_-g9..0;:. ·~
_(B) ..- :S.~q '· ._., ··.·-~ .. ·.. (C) ·..-:.- CO - : .· ,CQ 2 ,· .. -(D)
..
..
..
:
Whi~h qf _.th~ ."foljo_wing grap.hs MOST . 24. Match each underlined .~lement with ts . .. · · · .oxidation .state. E~d{h~id~tion .state may be· .·. . -.· ·:.- ~~curat~.ly ~.r~-~r.~~e_ntS)he treiJd· ~n~;vo latil ity · roniine. ~~d. iocline?~:. · _ .of. chl9ri~e;:b. . used once;-.nor~ tha~~on~e ·or n~t at.aH. : . . .· ·. "' .
I
...-.· .. ~A)·.
18.
<::
19 . .I
j
20.
:I
l
Which of the following oxides has a_ s.im _le · · molecular structure?·· (A) (B) (C) (D)
number Atomic .·· ..
Na 2 0 Si02 Al2 0 3
{B)
S03
JI
21.·. I
:j
Which of the following -~tatemehts al;> Group II elements are corre,ct? ·.' :
t. · - ..
·· .
I
.J ]
I.
.:!.,
ll.
l
:t
III.
Atomic r;1~iu_s · in¥re~ses down t e ·· group. Ionic radius de.creases down t e
· . ::_:_. .
group. .
;
IV.
i
!
.~
(A) {B) {C) . (D)
22.
.
Io~isation energy' de<;r·e-ases
4o
·
· the group.·
Atomic nu~ber
::·{C).
Sulp~ate solu~jlity·incr~~ down
·. grotiii · ··'
~-,
·· .· .
:
I and III only
U _and UI ·only I and IV only ·· Atomic number ..
'Il and IV only. ·
The metallic chara~ter of Group TV elemen s increases down the gro"up ~ecause
(D) t;.O
.5 .0 til·-
(A) (B) (C)
they are all reducing agents their melting points are high the +2 oxidation state becomes mo stable
(D)
atomic radius increases for eac successive element
~:3
....
~ (.)-
c -
0
:>
Atomic number GO QN TO Tl-IFNF_X .T.PA n-.:;
·=
------------------------------·--·"----·--·
=:
...
..•
J
J
25.
.:·· · ·, .:~Itemi'l9··refeis·to tlie:tabhi~which.-showS. the
The precipitate.fomied when iodide ions react ,vith AgNO/!tci) is· ;· ·.. · ~ .......·,
. opservations:made }fl:;.ih:e.:qfi~)li~iive-'.analysis.
(A)
soluble in dilute-nqueous·ammonia
of two cations, X and Y, \.\Sing dilute NaOH ·:· .~·-: (aq) and Na2C03 (aq).
(B) (C)
.:·: · . · yellow silver ioelide cream silver hydroxide
Cation
!
(D)
soluble in nitric acid
i
'
J J
Thei.r:_out~r electr~ns
II.
IV. (A) (B) (C) (D)
II only·· IVonly I and III onlyII and fV only
(C)
(D)
30 .
. :- 4s
[ArJ I t-t.·l t-1-l·t-t.l ti I t.J- I.[LJ
t t ·I t l I t 3d-
(C)
[Ar]
[ArJ
Mg~+
.AP~
· Ba2+ ·. , ... Mg2~ Zn2 + .:: .. • ·
Ca2+
.
*
A student adds dilute· hydrochloric acid to a . satnple._of copper sulphite.: Which of the · ·.foiJowihgTeageiits .wou_ld:;NOI:'be a useful . ~-;' ··.;_, ·, '·· . .·test for the gas :emitted?!·:: .
4s
I t -1- 1· t:.
·.
I. ffi] 4s
.-· ·.
.
·:'"' · _. ..._(A}· =.::<.Red litinus ·.-·· · ....: (B) · Blue litmus .. ·· · =
···(tf: ·. ·:::N!Ao·~--~_.,fr'X~5tf~ ··: .:
I ti I t-1- l'tt I t-t,··l·ti.l [LJ 3d
(D)
.
..
."Pb2 +··,.: .. ::,... <;.-·:··
···".
3d
[ArJ I
CaH
··. _.:._.:
atom is r'epresented by : .. -· . .
.· 3d
The possible identities of X and.Y are .
(A) . (B)
.The ground state configu_r~tioh for the copper ·.
·
WNt~_.B~8ipi~at~.;.;;t . )~~qjt~ precipitate
soluble iri·excess· .... with effervescence . G~&· gives a:white ~recipitate with Ca (OH)2(aq)
:..., .·. :.x·- .·. ;y;:_... :~ ,.:··.-: .-.-:.:··.
..
(B)
..... .X.:. ..
29.
.:
(A)
·.•
lfe in partially
filled 'p' sub-le-yel~. . . _They cah have .vari~ble. oxidation· states. They usual~yhaye lo:w densities. ,
III.
27.
White .precipitate White precipitate . :··:";· : . : .. :1_•• -·;r::.: .ex.ces~·.; ....; ·.::: '.·.·'': :,·.~:... :· . X
• .•••. · :":. .1 •· insolubte·..in,
Which of the following ~ay·be,.considered · · true for transition elements? . - ::' . ....._ Their co·m_pounds are :u.sually I. · coloured. ·
26.
NaOH(aq)
·· ·
~·:
.
4s
I t~ -I t t I t~:·l t-1- 1·-t · I ;[ill ·r~.J .. ..-! .f~.~-
.
28_, · --Which of the fo~lowipg species CANNOT act as a ligand for transition metal complexes of · Cr1+?
H 20 NH 3
(A) (B) (C)
NH.~
(D)
c1-
·· l. \
:_., .. ··:
(A)
· ·compl¢.~~~i
(B)
prote~iJ~g. :th'e'_-:g~~phite .~r:t9de from
(C)
providing'_ a ·lower· melting·.:p-oint
·:
·,
· ··.· " ·-
· ~·
.·sodium.siiic~i~
o
2- .. i·o~s·
...:..: -~!i~~~~: .· i : .. · . . . gent?r,atj.n_g AP~ . dl~c·h~rged at
. .
ic;m~.
that are
the anode
'-.TF'F~Ttl TW~ "'TT:;"VT i.> A._G_C
~··· ·= i ~ -
.
=;;.._,-
___;.;;-..-:;;;;:::.
/
,.
-9 ·.· Tp; w_l!at \IS~ .c~.n..Jh~~ .:P~9-G.l!9.t~Jrpm JJ:lJ~ .. fractionl;ll d_i$t~lla~i~n ·qf c~~-~ C?i.J .1?-~ .put?. . . . •
. l.
·II. III.
•
•,
. • ,
r
I 1
~·:---:•
:·:
,
!
•t 0 ,I
•.
,,
.. •
,
,
•
...... ) .
,
1·~U¥Q ·a .~Jg~_ t~r;nperan~r~:employ~d?
Pn).~~_cing-~v~r&i. ..... .. . .. . . .. ·...
.,(J?). .. .(C) .·
.. >....:·;
·...•
'i. . :
·._ = :
·
:~·~:··~:h-~teii~r'·s··~rinciple does not
~ ·=· . :. f:tpplyJq:Ul~ :4t~u~trial manufacture ·1·- · .- qf aqm.t~:m~-~.-.: ·.
:, ·rh~ ~~-a~tio_n j~ ~_11dothermic . . _ ·.:.· ..(C) ,,. >A.hi.gh,t~roper3:ture drives the ,.,. ... eqU,j_ljqrjym f9rward. . =: .. .(B) -·
.I, II .arid -lH ·;_
(D)
;
(A)
~
nr~nly :·.. :. _.>:-- . I ~~d ll .only:.'.·... . II -~n4j~ -only;:;.
(A)
P!PG.~-~s:pre9j~ts th.a;~.·~-~igg ~r~s~~~e and low t~·mper,~tuJ~;:·:ar_~J.id.~aLL ·. H.Q.wever, a teinperat_ure·of 400 to 500°~ is used. Why- is .
0
: ~a~~~g ~&?.ftflg ',i .. lxfak~pg ~~~~J~.s ._ •
1
.-, ,o
Apply~ngJ..e_.~hat~li~r;s RDQ~ipl~ to the Haber
3_3.,
l
tPJ .· ;. ,:Tl)~::-.:~eac.tion .--rate at
lo.~er
_ · --~ ;; . :_: _;-... : .- · _. · _.t~rpp~ra~~re~ would be too-slow. . ...
..
-
.·. ··\:
.
.
:.
'.l'
~In the-~anufac~~i:'e of chlorine by ei~ctrolysis of brine; the ionic ~quations . · 34. . ·:. for:fue·:pioce~s·es.·o~c.uring at the cathode and anode are .
.-
,·:- :.·.. : J
•
~-
.•=
Anode
Cathode
_(!\~ (B)
· · .. · --~Na+(aq) .+.2e·-~-2Na(l)
~Cr(aq) .7Ch(g) + 2e-
· 2~a~(a~)-; 2e· ~
2Na:<_i_).'·· - :_._"_·. --~-~-r~<~g).-~
· iCr (1}_-4' Cli(g)'+ 2C?- .
+. :2e- ~ 2Na(l) . (C) . ' . · 2Na~(l) . .. . . ~
c~-(~q~ :-7 ~l(g) ~ e~.
.:-_(I?).,_..... _.-:Na\~~j~ :1e- ~ Na(l)
35.
Which ofthe following is NOT a cpmmerciaJ n? ··._.: . methodof~lcqhol P~C?Q~~~jo .····: .. · .
decrease the
··
· Hydration Fermenta tion
(C)
(D)
j
.
Aerq~i-~ ~~~P!r~~~9~
(B)
36.
in :~at~r is importan t to aquatic iife .. Wh~ch of the following fact?rs
Dis~ol~e~ _Q~yg~n
37.
. -~nai-~o~i~-~~~p~~~tion_ · .:-· ~: ~
-(A)
r
.
Which of the following are importan t uses of sulphur dioxide and its compoun ds?
Restricting the growth of mould Inhibiting the oxidation of food The Contact Process
I.
11. III.
(A)
I and 11 only
(B) (C)
I and 111 only II and III only
(D)
I, II and III
_,_ ----
.;
,4JOZ~·
Gh(~) + ~~-.:
.
conct?ntrati~n
of oxygen in ·
.. :··: .
.
I. ·.; ·.:. . :
. II.
Dec~y ;of o'~g~~ic materia
is
Turbulep<;e. of the. water
.·~i1f ~~_-' _pl);tps~tpesi~-: · ·_
·
-· .. IV.:.. ·. J{espiratiqn, ......_ '..;·.·
.(~) (B) (C) .(D)
I_ aDd Ill, . I and IV II and III II and IV
nn ON TO THF. NEXT PAGE .s::. -.. m ~--~-----!!
ij
•
_..
. - 10.:
38.
·4f. -:: witi<::h: ·or the.;folibw"ing. ~t~tetri·ents :·ahdtit '
to
Catalytic· converters are-now w'idely used reduce emissions of oxides of nitrogen, carbon monoxid e and hydroca rbons ... :. :·
··~. .·-~pu'rific~tioh tif~bihe~tw '.Wat~r 1is NOT true?
Which of the followin g·;a:re·M OST likely · taking place in the converte rs?
I.
Carbon monoxide+ hydrocarbon~
II.
carbon dioxide and water. Carbon nion·ox~ide +:·oxid es: of· ni~rogen ~ carbon iiioxide and
(B)
· ·-withsoil·w·ater:!: · :
(A)
I and II only I and Ill onty· II and Ill only ·:.:;: I, II and III
39.
. :..:.· ·.
.. ..
:~, ~-- :· ...:
40.
:-.(C)- .·-.·PhQ.tospJt¢re
•.
:·:. ··.
Which ofthe following combin~doris includes.
Q
•
•••
: t
~.
••
. . .:
.........
.
. . Ammonia" is used. to minufac tllre fertiiizers . . . ·:1n~t~t~ifi~iit::nit;6·ge.rl"" is. essenlial for "th~ ; ·~-·· ·. :-fotm"ittiorh)fplirit'protein. ·. .
· ~--Wbich-{erlilizet :would
.{_B) (C) (D)
plant
Arn~orliun{l-Htr-ate,'NH 4N0 3 • ·. Urea~ .(i-·r~~) 2 CO. . (B) (C) ·. -. ·Ahirlioniuiri..'J~tiqsphate,:.(NH 4 ) 3PO 3 (A)
(D)
Potassr~~~\~~~~tt~J:~KNo~· ('·
;
.
(A}
_be BEST for
--~~".4~? :; .·. ;: ·:··!. ·--~'~:.--:·· .
renewab le energy alternati ves· ONLY? •
· Hydrosph-ere .
· · ·Item.43.refers to the followin g informat ion.
·. are lighter than CFCs.. · ~re more polar than CFCs break down in the troposphe·re more.· .. 4~. · readily tha.ti CFCs · . are less volatile than'CFCs .
Stratosphere "(A) . (B).·· .. :TJ;OP9~Ph~re . (D)
to
(D)
·.: ... ·. :.
.: .• r.
.·CFCs (chloro fluoroc arb.ons ). are being replace d by HCFCs ~. (hy~irochloro fluoroca rbons) in an effort break dowrl . less ozone.· This is because HCFCs {A) . (B) (C)
·ti-eaimerit 6nty.
In ~hich laye~ of the atiriosphere. is ·ozo~e ·detrime ntal to hl.unan·health?
42.
·;~:J,·=·:
of
l#ge·
(0)
gas.
(D)
Very:s.lrialFartlou'nfs of chlorine can -~mbunts water. . purifY Ozone ··p-fi'fifi~s water aflhe. time of
(C)
Oxides of nitrogen ·are converte d by th~ action of the catalyst to nitrogen .
(B) (C)
water
to form hyp
.
nitrogen gas. III.
- Chlorine're~cu{Viith
(A}
. .... . ~
Tidal, wind; ge?th,ermal ~d solar Wind, coal, riuCieat and gl6therm al Geother mal, hydroelectric,.tidal and gasohol Wood, petrc;>l, peat. and m~~hane
GO QN TO THE NEXT PAGE ' =::.
.•
l
!
,
".
•• , . ·
'
- 11 -
.... ".
44.
I
•
greenhouse effect caused··by- g~~e~ su C02 in the atmosphere~
(A)
the formation of photochemic al smog?
as
.
·
Promotion ~f photpdi~spci Absorption of infrared radiation ·.··
Free radic~l fonitation
(A)
Su1phurdioxide
(.B).·
Ozone Oxygen Nitrogendiox ide
(C) .(D)
.
reactions · (B) (C) (D)
Which of the following is NOT involved in.
. 45.
Which of ~he fo11owing represent
.•
. .
~bsorption of ultra':'oilet radia~i
I r
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CARIBBEAN EXAMINAT IONS COUNCIL ADVANCEDPROFICIENCYEXAMINATION
SPECIMEN PAPER · MULTIPLE CHOICE QUESTIONS FOR
CHEMisTRY UNIT 2 - Paper 01 90 minutes
READ THE FOLLOWING DIRE.CTIONS CAREFULLY Each item in thistesthas"foursug gestedanswers lettered (A), (B), (C),(D). Read each item you are aboutto answer and decide which choice is best. Sample Item Whichofthefotlowingisthehighestenergy~ransition in an organic compound?
(A)
(B) (C) (D)
Sample Answer
n to cr* n to 1t* cr to cr* 1t to 1t*
The best answer to this item is "cr to cr*", so a~swer space (C) has been blackened.
Copyright© 2005 Caribbean Examinations Council®. ·All-rights reserved.
0221201 O/SPEC2007
~2-
1.
Which of the followi ng may be respons ible for the wide diversity of organic compounds?
I.
n. III.
IV.
(A) (B)
(C) (D)
2.
Carbon forms strong bonds with itself. Carbon forms four bonds. Carbon exists in three allotrop ic forms. Carbon acquire s a full octet of electrons. land II only II and ill only I, II and IV only
H
H
~ H-C .- C- C..;.... C
I
I
I
@
.·~ ~ (B)
(A)
(CH3) 2CHCH2 0H
(B)
NH2CH 2COOH
(C)
N}\CH (CH3 ) COOH
(D)
(CH3) 2CHOC H3
Which. of the followi ng feature s may be charact eristic of conden sation polytrters?
II. III.
I, IT, Ill and IV
H
4.
Which of the followi ng compou nds can be resolve d into optical isomers?
I.
I~
Which of the followi ng is the structur e of2phenyl butanoic acid?
(A)
3.
H
H
H
I
I
I
0
(A) (B) (C) (D)
Presenc e of OH and COOH groups in monotners Elimination of a small molecu le Region of unsatur atio.n in the monomers lonly II only I and II only I, II and lli
'oH O
~
H-c -c-c -c 'on I .l I H (gJ H
(C)
H" .H
I
I
H COOH
I~
H-C -C-C --\9)
(D)
I
I
I
·H
H
H
H
H
H
1 ___ 1
I
~
0
H-· c-c- c-@ -c I
H
I
H
I
H
'oH
-----
GO ONTO THE NEXT Pf\GE
0221201 O/SPEC2007
-3-
5.
Qiana is a polymer that feels like silk and has the following generalized partial structure:
0
H ·
H
II
I
I
tc-:X-C-N-Y-N:t II 0
The pair of monomers in Qiana is (A)
-
qo c-x-c
and
'oH
HO/
..
H
H
0~
/ N-Y-N H/ 'H
'
...
t.;
'i i--
(B)
and
C-Y-C
·.i ..
· 'oa
HO/
(C)
'
//0
'
H/
'oH
H
N-Y-C
and
N-X-C
H/
/
N-X-N H/ 'H
H
qo
H
'
H
qo
0~
'oH ..·_
..
(D)
H
'
H
qo and
N-Y-C
H/.
'H
/ N-X-N
'
H/
H
.. ·::
'H
. ·'
........
.
--
GOONTOTHENEXTPAGE 0221201 O/SPEC2007
.
•'
~
-46.
Which of the following represent naturally occuring macromolecules?·
0
0
II
II
-NH-C- (CH2 )4
(I)
-
C- NH(CH2 )6 -
.. <
HHOHHO
I
I
II
I
I - II
-N-C-C-N-C-C1 I
(II)
C~
CH2
I
OH
(III)
(IV)
-co-@-co-o-cH2 -cH 2 -o-
,:· I
!~ '
r~ ..
(A) . (B) (C) (D)
I and II only II and III only
m and IV only I and IV only
·.....
7.
To which carbon atom in the compound below will an electrophile be attached?
~0
.',.'t>
c
_ / 'o-H (C)
GOONTOTHENEXTPAOE
0221201 O/SPEG2007
.;. 5-
8.
Chlorine reacts with methane to form chloromethane! The organic intermediate in the reaction is (A) (B)
(C) (D)
9.
12.
Which of the following is NOT oxidised by KMn04 / H+(aq)? H "" H
(A)
an ion an electrophile anucleophile a free radical
I
I
H
H
1:.
I
H-C-C=C-C-H
I H
Compounds X, Y and Z below are isomers. X
(B)
I H
CH3 -c-c~
II
0
(C)
H
"-c~
0
@ (D)
H
H
I
I
H-C-C -OH
The order of decreasing ease of removal of the bromide ion by hydrolysis is
(A) (B) (C) (D)
X>Y>Z Z>Y>X Y>X>Z Y>Z>X
Items 10 and 11 refer to the following compounds:
(A) (B) (C) (D)
I H 13.
I H
Which pair of compounds is formed when benzene and methyl benzene undergo nitration? (A)
(B)
CH3 CH 2 COCH 3 CH3 CH 2 CONH2 CH 3CH 2CHO CH3 COOCH2 CH3
Match EACH item below with one of the options above, each of which may be used once, more than once or not at all.
10.
Aldehyde
11.
Ester
(C)
(D)
and N02
~' N02
UUUN TUTHENEXTPAGE
02212010/SPEC2007
-6-
14.
Ethanoic acid turns blue litmus red but ethanol does not, because ethanoic acid (A) (B) (C) (D)
has a polar - OH bond but ethanol does not has a higher pka value than ethanol is a stronger acid than ethanol is. more miscible with water than ethanol
1 ! / For which pair oftitrations is meth~l orange (indicator range 2.9- 4.6) BES! smted? (A). (B)
(C) (D)·
15.
Which of the following statements about aminoethanoic acid, N~C~COOH, is NOT true? (A) (B) (C) (D)
16
Its aqueous solution has a pH of 7. It has a high melting point. It is soluble in base only. · It is soluble in both acid and base.
25.0 cm 3 of an aqueous iron (II) salt is acidified with an equal volume of dilute sulphuric acid and titrated against 0.02 mol dm·3 potassium manganate (VII) solution. The endpoint is 30.0 cm3 • F 3+ M 2+ 4H 0 + 2+ 5Fe(aq)+Mn04(aq)+8H(aq) ~5 e(aq) + n(aq) + 2 (I)
In an iron determination, a student obtains a mean value of.35.50% for the iron content and a standard deviation ofO.Ol. The actual value for the percentage of iron in the sample is 39.45. In terms of precision and accuracy, :whiCh option best describes the student's results?
(A) (B) (C) (D)
Strong acid- strong base AND strong acid - weak base Strong base - weak acid AND weak acid - weak base Strong acid- strong base AND weak acid- weak base Strong acid- weak base AND strong base - weak acid
High accuracy and high precision High accuracy and low precision Low accuracy and high precision Low accuracy and low precision
The correct concentration of the iron (II) ions, in mol dm·3 , is 5
(A)
(B)
X
0.02
25.0 X
30.0
5 X 0.02
X
30.0
25.0
5 X 0.02 X 25.0 (C)
30.0 25.0
(D)
.-17.
Which of the following is NOT a characteristic of primary standards used in titrimetric analysis?
(A) (B) (C) (D)
5
X
0.02
X
30.0
High purity Stable in air Deliquescent Soluble
GOONTOTHENE XTPAGE
0221201 O/SPEC2007
Treatment of an 8.00g sample containing a lead ore with excess sulphur ic acid yields 4. 75g of lead (II) sulphate.
20.
23.
(A) (B) (C) (D)
The correct expression for the percentage of lead in the sample is
(A)
(B)
(C)
(D)
207
X
8.00
303
X
4.75
303
.X
4.75
207
X
8.00
207
X
4.75
303
X
8.00
303
X
8.00
207
X
4.75
X
100
X
100·
X
100
X
100
Which of the following is the highest energy transition in an organic compound?
n to cr* n ton+ cr to cr* 7t to 1t*
Item 24 refers to the followi ng structu re of caesalpinin.
OH OCOCH3 OCOCH3
Which region of the electro magne tic spectrum below provides the required energy for n.m.r spectroscopy?
21.
24. I
I
(A)
I
I
ltf
r
(B) 1visible (C)
(D)
The compound caesalpinin exhibits absmption at wave numbers 3400 cm-1 and 1750 em·' in theIR spectru m. Which functio nal groups are respons ible for these absorpt ions?
. wavelen gth increase s - . .
22.
Which is the correct sequence of steps for the detection of the concentration of heavy metals in marine sedime nts by Atomic Absorption Spectroscopy (AAS)? (A) (B)
(C) (D)
Concentration of sample solution~ aspiration ~ atomisation Concentration of sample solution~ · atomisation ~ aspiration Aspira tion --+ concen tration of sample solution~ atomisation Atomis ation ~ concen tration of sample soluti~n ~ aspiration
(A)
-oHa ndc =o
(B)
(C)
C-Ha nd- OH I -ORan d
(D)
-p-oa nd 1C =o
/
-f-0
I
'\.
GOON TOTH ENEX TPAG E
0221201 O/SPEC2007
- 8Item 25 refers to the diagram below which shows a double beam instrument used in spectroscopic analysis ofliquidlsolution.
25.
What is the name ofthe device labelled I? (A) (B) (C) (D)
Grating Photodetector Shutter Monochromator
Item 26 refers to the following information.
27.
Hydrogen bromide undergoes fragmentation when passed into a spectrometer. Bromine has two isotopes, Br-79 and Br-81. The
Which of the following atomic nuclei pairs both have nuclear spin?
H and 13 C and 24Mg 19 F and 23Na 32p and Jlp 2
(A)
1H
(B)
(C) (D)
hydrogen involved here has only : H isotope. The spectrum is given below.
Item 28 refers to the following n.m.r spectrum of a compound of molecular formula C2 H3 Cl 3 •
n IV I
m -
79 80 81 82 83 84
J.Lle
26. /. Which ofthe following combinations of ionic J isotopes is resp~msible for the. peaks at mass 79, 80, 81 and 82J Particle III
I
II
(A)
79Br+
: H 79Br+
(B)
79Br
(C)
79Br+
(D)
79ar·
H 79Br-
, H 7!1Br +
s•ar
H RIBr
s•ar+
H 79Br
siar·
I
I
I
I
I
I
I
I
10
I
I
I
9
8
7
6
5
4
3
2
1
IV
a•Br+
. H 79Br+
I
-~
28.
Which of the following compounds may be assigned to the n.m.r. spectrum?
H s•ar+ H Blar
(A) (B) (C) (D)
Chloroethane Trichloroethane 1,1, 1 -Trichloroethane 1,1,2- Trichloroethane GOONTOTHENEXTPAGE
02212010/SPEC2.007
-929.
Whcih of the following are all examples of commonly used stationary phases in chromatography ? (A) (a) (C) (D)
30.
32.
Which fractions wou1d be obtained between oc respectively?
20-200 oc and 275-375
Cellulose, alumina, starch Silica gel, alumina, cellulose Silica gel, cellulose, sodium chloride Alumina, silica gel, aluminium chloride
(A) (B) (C) (D)
A solution of5gofan organic compound X in 200 cm3 of water is shaken with 100 cm3 of choloroform. 1.3g of the acid remain in the aqueous solution at equilibrium. The partition coefficient of X between water and chloroform is
Crude oil is separated into petroleum products · by use of fractional distillation.
33.
oc
20-200 oc
275-375
Bitumen Diesel Naphtha Diesel
refinery gas kerosene refinery gas gasoline
Purified N 2 gas and H 2 gas are reacted together to form ammonia as shown below.
...
N 2 (g)+ 3H2 (g) catalyst~ 2NH3(g) (A)
(B)
3.7 6.5
tlH=-92 kJ moC 1
3.7
X
6.5
X
Based on Le Chatelier's principle, which combination of pressure and temperature would give the highest yield of ammonia?
10-2 10-3
(A) (B) (C) (D)
6.5
(C)
-
(D)
10-2 3.7 X 10-2
3.7 6.5
X
34. 31.
In the conversion ofbauxite to pure aluminium oxide, what is the compound obtained after filtering and adding carbon dioxide to the impure bauxite?
(A)
Al(OH)3
(B)
Al(OH) 4-
(C)
SiO/-
(D)
Al 2 (C0 3) 3
Low temperature, low pressure Low temperature, high pressure High temperature, high pressure High temperature, low pressure
Ethane I formed by fermentation will destroy . . the enzyme-produci ng yeast. What is the 1owest percentage of alcohol at which this occurs?
(A) (B)
3 13
(C)
20 30
(D)
GOONTOTHENEXTPAGE 02212010/SPEC 2007
- 10-
35.
The oxygen -gas used in the contact process must be dust free to avoid poisoning the vanadium (V) oxide catalyst. Which reaction would be affected if dust is present?
t
(A)
S(g) + 0 2(g)
(B)
2S(g) + 302 (g)
(C)
2SO/g) + 0 2 (g)
(D)
2S(g) + 302 (g) + 2H 2 0(1) -t ~
3 9.
It is estimated that one chlorine radical can break down 100 000 ozone molecules. Which feature of o:hlorine radicals may account for this?
S02(g)
(A) (B) (C)
t 2S0 (g) 3
1 2S0 (g) 3
(D)
Regeneration by reacting with ozone Ionization of oxygen gas Chlorine monoxide radicals formed with oxygen Reaction with ozone to form more oxygen gas
2~S0 4 (aq)
40. 36.
Sulphur dioxide is used in food preservation because it Is (A)
(B) (C) (D)
(A) (B) (C) (D)
weakly acidic a reactive gas a reducing agent colourless
41. 37.
A polluted river near a paint factory is tested with acidified potas~ium iodide and a bright yellow precipitate is observed. Which ofthe fo IIowing pollutants is likely to be present?
(A) (B) (C) (D)
38.
PO/CN· Cr3+ Pb 2+
The substance formed in combustion engines of vehicles, which may lead to the formation of acid rain is
Which of the following CANNOT be used to control atmospheric pollution?
Water can be purified by all of the following EXCEPT
(A) (B) (C) (D)
42.
desalination reverse osmosis distillation sublimation
The ozone layer is a thick blanket over the earth's surface. It prevents ultraviolet radiation from entering· the earth's atomosphere. Where is the ozone layer located?
(A) (A) (B) (C) (D)
Using cleaner fuel~ in industrial plants Using catalytic converters in vehicles Decreasing vegetation in urban areas Using chemical scrubbers
(B) (C) (D)
Troposphere Stratosphere Ionosphere Mesosphere
GOONTOTHENEXTPAGE
02212010/SPEC2007
- 11 -
43.
Which properties of aluminium make it suitable for constructing airplanes? I. II.
Low density High tensile strength
III.
Impenneable oxide
IV.
Conduc~ electricity
(A) (B) {C) (D)
I, IT and III only I, II and IV only II, III and IV only I, II, III and IV
45.
44.
The term 'residence time' for gases in the atmosphere refers to the length of time the gas
(A)
(B)
(C)
(D)
takes to move from the earth's surface to the upper regions of the atmosphere remains in the atmosphere until it·is removed in a sink takes to move from the troposphere to the stratosphere reaches a concentration to become a pollutant in the atmosphere
Which of the following chemicals forms a non-toxic substan~e when it reacts with nitrogen monoxide?·
(A) (B)
CH4 H 20
(C) (D)
80 2 CO
. J l .l l l
l l l l •l
•]
J ]
J l.
J J
J iJ