2022_chem_alevel_nov_paper2

Extracted Content: 2022_chem_alevel_nov_paper2

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Candidate Name . anon ood. ee Centre Number Candidate Nurpber

Lae Hh

ZIMBABWE SCHOOL EXAMINATIONS COUNCIL

General Certificate of Education Advanced Level

CHEMISTRY 6031/2
PAPER 2

NOVEMBER 2022 SESSION | hour 30 minutes

Candidates answer on the question paper.
Additional materials:

Data Booklet

Electronic Calculator

TIME 1| hour 30 minutes

INSTRUCTIONS TO CANDIDATES FOR EXAMINER’S USE

Wnite your name, centre number and candidate number in
the spaces at the top of this page.

Answer all questions.
Write your answers in the spaces provided on the question

Paper.
INFORMATION FOR CANDIDATES

The number of marks is given in brackets [ ] at the end of
cach question or part question.

This question paper consists of 12 printed pages.

Copyright: Zimbabwe School Examinations Council, N2022.

©ZIMSEC N2022 [Turn over

[UNO A

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4 2

Answer all questions

; | Por
; P the tons R
1 (a) Distinguish, using a diagram, the behaviour of | ay
MM-, 2H<em> and $He?</em> in an electric field | m
|
|
(1)
(b) A gascous atom of an clement, X, loses electrons to form a cation of the |
element. |
(i) Name the chemical change that occurs when X loses electrons.
(ii) Write an cquation that represents the chemical change in (i).
[2]
(c) (i) Write the electronic configuration of 027 ion.
[1]
60312 N2022

WI . =

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Sarsathon at

sl) Complete J Mee PD a sketel peapti, te alive the
MICCORAIVE heapeyy ionisation energiog of OF tery
r
fa
5
HH
0
G
5
on
a — saaaee 4. 4 a
(23 4 5 6 7 ¥ 9 {0
number of electrons removed
Vip. 1
(d) Fig. 1.2 shows the mass spectrum of an clement Q.

abundance

78 79 BO KL 2 83

relative mass (m/e)

Fig, 1.2

OOININ2022

LANNE

~

[3]

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“ *

om ss of
atomic mass of Esterstieg

¢

a) Determine the relative

(li) Eplain why Agl,,, is insoluble in NH v4)

[Total
2 (a) Explain the term
(i) order of reaction,
(ii) rate of reaction

GUSN/T NI922

Nn 4

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Por (b) An experiment was carried out to investigate the kinetics of the reaction Ruscsiner's shown ee HO 26,9) + 21 faqs + 2H ayy 7 2H2O 0 + Lacan) Table 2.1 shows the results of the experiment. | “we Table 2.1

4

experiment valume/cm* relative rate/s!
No \
‘|

2.22» WW”

bale lo?

112% 107

5.50% 10°

Determine the order of reaction with respect to

(i) hydrogen peroxide, HyO2,.4),

(ii) iodide tons, T4,),

(iii) hydrogen tons, Hhq)

[3]

GUILE N22

(Turn over

|QLQUA ACURA

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fr

ty) Write a rate equation for the reaction Pay

Cag

° o Aete 12 P the
(ii) State the species invalved in the rate determming step of the
reaction mechanism

(iii) — Suggest how the relative rate of the reaction was monitored

Is)

(d) Explain why the total volume of the mixture was kept constant for all the |

experiments. |

|

|

[|

(Total: LO]
3 (a) Describe the observations made when magnesium bums in oxygen.

{2} |

(b) (i) Wnite a balanced chemical equation for the reaction of
magnesium with steam.

{

|

(ii) State the trend in solubility of Group (IT) oxides.

|

a = |

6031 2N2922

| VINA

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7 Por

li ; ; '
(WW) Explain Why itis better to teat acid indipestion using a suspension Pxeseinn’s

OC Magnesium hydroxide rather than using calcium hydroxide Use

{4]
(c) (i) Describe the bonding and structure in

1. CO), |
iD SiO) |
|
(3) |
(ii) Give any one use of SiO. |
|
1)

[Total: 10] |

GIVI N2022

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HNN NAMA

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8

. _ . Fig. 4.1
4 (a) The structural formula of benzocaine ts show? mney

CO,CH,CH,

NII,
Fig. 4.1

F . asent in benzocaine.
(i) Name any two functional groups present in benzocal

2.

a

(ii) Give the structural formulae of the organic products formed when

benzocaine is heated in dilute hydrochloric acid.

(b) — Benzocaine can be produced from compound B using the reaction scheme

shown in Fig. 4.2.

Coon

step 1 +X Step? =
NO, NH,
compound B
Fig. 4.2
(i) Name compound B.

CO,CH,CH,

6041/2 N2022

{MMIC

[4]

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9

(id Supyest a possible structure for X.

(iti) State the reagents and conditions for steps | and 2,

Step 1 reagent(s)

conditions

Step 2 reagent(s)

conditions

wn

Draw the displayed structural formulae of the isomers of A other than

geometrical isomers.

(b) Fig. 5.1 shows an organic compound G.

BVAVA A

compound G

Fig. 5.1

6091/2 N2022

BONEN ML LLL

(a) Compound A is a hydrocarbon with molecular formula CsHy.

[6]
(Total: 10]

|

O

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9 ta desprned wher Piaranetenen’s

ver $ es
(ql) Witte the structural formulae of the organic produc Use
Gr teaces with

iF SOC,

2, hot acidified KMnOg,

3) 2.4-DNPH in acidified methanol.

(ii) Name the type of reaction that occurs between G and SOCI:

—

(c) Suggest, with a reason, one use of a Platinum Group Metal.

USC;

Feason,

———C—C—iSBDF

(Total: 10}

60312 N2G22 {

UIT

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i

6 a) Yetine
®) Detine the term fLenetic ingerprintine

(b)

Past

aw

{1}

(ce) Fig. 6.1 shows DNA profile taken from a victim and a crime scene

compared to three suspects,

Victi

Fig. 6.1

(0) Deduce, with reasons, the suspect who might have commited the

crime.

GUAT N2022

MUNA AEE

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(ii)

State any other (hree application(s) of genetic fingerprinting.

I.

tw

6091/2 N2022

[3]
[Total:10]

Une

Le

f
}

4
i

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