6031q1specimen

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General Certificate of Education Advanced Level

CHEMISTRY 6031/1
PAPER 1 Multiple Choice
SPECIMEN PAPER 1 hour
Additional materials:
Data Booklet

Mathematical tables and/or Electronic calculator
Multiple Choice answer sheet
Soft pencil (type B or HB is recommended)

TIME 1 hour
INSTRUCTIONS TO CANDIDATES
Do not open this booklet until you are told to do so.

Write your name, Centre number and candidate number on the answer sheet in the spaces
provided unless this has already been done for you.

There are forty questions in this paper. Answer all questions. For each question, there are four

possible answers, A, BC and D. Choose the one you consider correct and record your choice
in soft pencil on the separate answer sheet.

Read very carefully the instructions on the answer sheet.
INFORMATION FOR CANDIDATES

Each correct answer will score one mark. A mark will not be deducted for a wrong answer.
Any rough working should be done in this booklet.

"his question paper consists of 16 pri a. t a 1
Copyright: Zimbabwe School Examinations Council, Specimen paper.
@ZIMSEC [Turn over

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For each question there are four possible answers, A, B, C and D. Choose the one you consider
to be correct.

1 The average mass ratio of the isotopes of the element 24.3 in increasing order
is 7:1:2.

What is the mass spectrum of X?

A B

relative intensity
relative intensity

23 27 23 27
relative mass (m/e) relative mass (m/e)

Cc D

relative intensity
relative intensity

23 27 23 27
relative mass (m/e) relative mass (m/e)

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3 Which molecule is pyramidal?

A SO,
B PCI,
Cc BE,
Dd AICI,
4 What is the number of moles of a gas occupying a volume of 0.25 m? at1.01 x 10° Pa
and 565 °C?

1.01’ 10° ’ 0.25
8.31 ° 838

1.01’ 10°’ 0.25

B 7
8.31 ° 565
c 8.31 . 838
1.01 “10° ’ 0.25
D 8.31” 565
1.01 10° “0.25

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A acidity

B boiling point

Cc bond energy

D thermal stability

Which cation A, B,C or Dis most oxidising?

A Pb**
B Cr**
Cc Fe**
D Sn?*

Which acid A, B,C or Dis the strongest?

acid Kavalue
A HE 3.510"
B HC/O 29°10
Cc HC/0, 1.1°10?
D HCN 49°10"

The measured initial rates for the reaction, X a) +Y(y > Zi +Wyy for different

concentrations of the reactants are shown.

[X]/moldm<em> [Y]/moldm</em> initial rate /moldm*s”
0.10 0.10 0.002
0.20 0.10 0.008
0.20 0.20 0.008

What is the rate expression for this reaction?

A ky}

B AX][Y]
Cc kX] [y]
D ~~ kx}

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11

Which of the elements A, B, C or D is most reactive with water?

A Mg
B Be
Cc Sr
D Ca

The diagram shows a Born-Haber cycle for the formation of NaC ly:

Nat Che
4{ s{
. .
Nat Cle Nat Cle)

3|

Na+ LChip

2]

Nag + ECL we

1

NaCl

Which set correctly describes the enthalpy changes 1 and 3?

1 3
A lattice atomisation
B formation atomisation
Cc formation ionisation
D lattice ionisation

How many Gand bonds are in a benzene molecule

6 a
A 6 3
B 12 3
Cc 6 6
D 12 12

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13

14

15

16

17

Which reaction is feasible under standard conditions?
4. + 3+
A I) BA Gia) oA Veg) +3AGi,

Nig +Pb,) > Nig +Ph?*

aq) (aq)

2. 2
Fe, +Mgi) — Fe”* +Mg,,

5S Aw E>

4 2+ 2+
Zn, +Caj,) > Zn, ay,

Which molecule or ion, A, B,C or D can act as a ligand?

A HO
B NO;
Cc NH?
D HCN

Ethanoic acid dissociates according to the equation:

CH,COOH,,, +H,0 > H,0},, +CH,COO;

aq) aq)

What is the effect of adding sodium ethanoate to the equilibrium mixture?
equilibrium shifts to the right

more CH,COO’ ions are produced
H,0* ion concentration increases

SO WPS

H,O ‘ion concentration decreases

Which atomic size relationship A, B, C or D is correct?

A P<S
B P>Se
Cc $<Cl
D S<Se

Which statement explains why the first ionisation energy of sulphur is less
than that of phosphorus?

The electron removed occupies a subshell at a higher energy level.
The electron is at a greater distance from the nucleus.

The electron experiences smaller effective nucleus charge.

The electron experiences greater electron repulsion.

Sane

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Which combination would result in a displacement reaction?

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19

20

21

A Ty, +NaB 7
B at ) tNal,,,

Cc Bry NaC,
D I, +Na C le,

Nitrogen gas is used to manufacture ammonia by the Haber process as shown:

Ny +3Hyg => 2NH, DH? = 184kjmol"

Which statement about the reaction is correct?

A 28g of N2 produces | mole of NH3

B low pressure favours the production of NH3
Cc low temperature favours the production of NH3
D high temperature favours the production of NH3

Which electrochemical cell notation is correct for the reaction

5Fe,+2Mn0, ‘.,) +0H;,,, > 5Fe*+2Mn™ +8H,0,,,.?

2+ 2+
A Mn0,,/ Mn” fro | Fer)
2+ a+
B Fe,)/ Fe, Hlr0 /Mn

Cc Mn’ y He

(aq)

/MnO, pe Fe(;, (ea) Fe,

D a Hj, Mn?*/Pe

Which pair A, B,C or D are isomers?
A propene, methylpropane

B propanone, ethanol

Cc propanal, propanone

D propanal, diethylether

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The structure of alanine is shown

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NH, re)
| Il

CH, — j — Cc — OH.
H

Which is a property of alanine?

A undergoes acid base reaction
B dissolves in non polar solvents
Cc has a low melting point

D the molecule is achiral

Which molecule exhibits geometrical isomerism?

2,4 — dichloro — 2 — but — 2 — ene
1,4 — dichlorobenzene.
4-methylhex — 2 — ene
1,1-dichloro — but — 1 — ene

Samp

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24

An organic compound of the molecular formula C,,)H,, gives two products on aromatic

substitution by chlorine.

The organic compound could be

(CH,),CH,

fet
Tet

CH, CH,

Propanol reacts with Tollen’s reagent to produce

Sane

silver and propanol.

silver oxide and propanoic acid.
silver nitrate and propanoic acid.
silver and propanoic acid.

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26

10

The structural formula of vanillin and carvone are shown:

HO O CH,
CH, |
C—H Oo
HO CH,
C=CH,
Vanillin CH,
Carvone

Which reagents can be used to distinguish between vanillin and carvone?

aqueous bromine

Fehling’s solution

alkaline aqueous bromine
2,4 dinitro-phenylhydrazine

Sanwp

Which compound, A, B,C or D is easily oxidised?

) OH
I |

A CH,—— C — CH, B CH ,—— CH——CH
O
I

Cc CH, —— C —— 0——CH, D CH ,—— CH,—— CH,

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27 The diagram shows the structure of fructose.

HOV

r
;°
HO—C—H
H—C—oH
H— c—o1
HCN
fructose

How many chiral carbon atoms are in fructose?

Saw P
AwnNe

28 Which method of waste disposal is the most recommended?

A incineration

B bioremediation
Cc reusing

D land filling

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29 What are the correct products of the reaction shown?

(0) + pith, products

I I
I
A + HI B + H,
I I
I
c + #, D + HI
30 Which benzene derivative A, B, C or Dis least reactive?
CH,
NH,
A
B
OH NO,
Cc D

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32

33

13

Section B

For each of the questions in this section, one or more of the three numbered statements
1 to 3 may be correct.

Decide whether each of the statements is or is not correct. (You may find it helpful to
put a tick against the statement(s) which you consider to be correct).

The responses A to D should be selected on the basis of

A B Cc D
1,2 and 3 Land 2 2 and 3 J only
are only are only are is
correct correct correct correct

No other combination of statements is used as a correct response.

Which factor(s) affect(s) the standard electrode potential of a cell?

1. pressure
2. concentration
3. temperature

Which species has/ have an oxidation number of +3?

1 ALO,
2 PO,
3. Cr,07

Which organic substance rotates plane polarised light?
1. CH,(CHOH), CH,
2. CH,CHBrCH,CH,

3. CH,CHOH CHC/ CH,

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35

36

14

The reaction of a hydrocarbon is shown:

CH, CHCH, +HC/>X

What could be X?

1. 2 - chloropropane

2. a mixture of 2 - chloropropane and 1 - chloropropane
3. 1 - chloropropane

Which property of period 3 elements decreases with increasing atomic number?

1. atomic radii
2. easy of losing an electron by an atom
3. acidityof the oxides

Which species is/are nucleophile(s)

1. NH;
2. NH,
3. HSO,

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37 The graph shows how the energy changes as a reaction progresses.

reactants

energy

products

time

Which statements about the reaction is/are correct?

1. the reaction is exothermic
2. the reaction is energetically feasible
3. the reaction is endothermic
38 The graph shows a titration curve.
14
x
7
pH

volume of reagent/em?
Which statement(s) about the titration is/are correct?

1. A strong acid is titrated with a strong base.
2. X is the equivalent point

3. The base is being added to the acid.

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16

The catalytic effect of nano particles is due to their

1. large surface area to volume ratio
2. nanometer-scale sizes
3. low melting points

The structure of Kevlar is shown.
oO oO
eo)
yor
H H

Which statement(s) about Kevlar is/are correct?
1. it is a condensation polymer
2. consists of two different monomers

3. It is a polyamide

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