4024q1 Specimen paperdocx

Extracted Content: 4024q1 Specimen paperdocx

Page 1

Extracted Text

CHEMISTRY 4024/1

PAPER 1 Multiple Choice

SPECIMEN PAPER! hour
\ dditional materials:
Mathematical tables and/or electronic calculator
Multiple Choice answer sheet
Soft clean eraser
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, B, C and D. Choose the one youconsider 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 donein this booklet.
A copy of the Periodic Table is printed on page 12.

This question paper consists of 12 printed pages.
Copyright; Zimbabwe School Examinations Council, Specimen paper.
©ZIMSEC [Turn over

---

Page 2

Extracted Text

A filtration

B chromatography
Cc sublimation

D diffusion

When liquid water changes into steam, the molecules

A break up into small particles.
B become very large.

Cc move further apart.

D give out heat energy.

Which apparatus would be most suitable for measuring 16.75 cm? of a liquid?
A a bulb pipette

B a burette

Cc a measuring cylinder

D a volumetric flask

The diagram shows a chromatogram of the dyes present in five different inks.

What is the total number of different dyes inall the five inks?

Roe w

Sanr

4024/1 Specimen paper

---

Page 3

Extracted Text

Which property allows substances to be separated by paper chromatography?

A different solubilities

B different colours

Cc equalsolubilities

D different boiling points

The diagram shows the distillation of a salt solution.

At which point would the temperature be equal to the boiling point of water?

water out

water in

Graphite conducts electricity because

it contains electrons that are free to move.

it contains protons that are free to move.

the layers of atoms can slide over each other.
it contains impurities.

Sanr

4024/1 Specimen paper

---

Page 4

Extracted Text

Elements are systematically arranged in the Periodic Table in the order of increasing

A nucleon number.

B proton number.

Cc valency number.

D number of neutrons.

Which pair of atoms has the same number of neutrons?
15 14
A 7 Nand 7 N

23 23
B 11Na and 1.9

14 16
Cc gC and 30

235 238
D 92 U and 92 U

The structure of an atom is shown.

Which statement about this atom is correct?

It is not a neutral atom.

Its nucleon number is 13.

It has 4 valency electrons.

It forms ions of a charge of +2.

SanY

4024/1 Specimen paper

---

Page 5

Extracted Text

4

Theelement francium, Fr, is in the same group of the Periodic table as potassium. The
formula of francium chloride is likely to be

A FrC/
B FrCi
Cc FrCi,
D FrCi,

The proton number of element X is 19. When X forms an ionic compound, the electronic
structure of the ion formed by X is

A 2,88.

B 2, 8, 8, 1

Cc 2, 8, 8, 2

D 2, 8, 8, 3

Which equation is balanced?

A CO0+0,-C0,
B —_2C0 +20, >2C0,
C CO+0, >2C0,
D —_2C0+0, >2C0,

The structural formula of butanedioic acid is shown.

O
\
ed
/ || \

Which statement about butanedioic acid is not true?

Its molecular formula is C,H,O,.

It contains 3 types of elements.
Its molecular and empirical formulae are the same.
One molecule contains 14 atoms.

San +S

4024/1 Specimen paper

---

Page 6

Extracted Text

17

6

What is the ionic equation for the reaction between sodium hydroxide and hydrochloric
acid?

A 2H), +OH,,,) >H,0y
B Hig) tO (ca) > H,0y
Cc Naj,, +C 1.) > NaC Ly.)
D Hin) +C Fg +> HC Lyaq)

A compound contains 33.3% carbon and 66.7% oxygen.

The empirical formula of the compound is

A CO,.
B C,0,.
C C,0,.
D CO,.

Sodium hydrogen carbonate decomposes on heating as shown

2 NaHCO, ->Na,CO,,)+H,0,)+C0,,,

What is the volume of gas produced at r.t.p, from the decomposition of 4 moles of sodium

hydrogen carbonate?
A 22.40 dm?
B 28.00 dm?
Cc 44.80 dm?
D 56.00 dm?

What is the number of chlorine molecules in 35.5 g of chlorine gasif the number of
molecules in one mole of a gas is x. ?

A 0.5x
B x
Cc 2x
D 35.5X

4024/1 Specimen paper

---

Page 7

Extracted Text

A chloride ion, C/’, has the same number of electrons as

Sane,

Br.
F,
Ar.
O*

During electrolysis, cations move towards the

Soar

cathode.
anode.
electrolyte.
battery.

An object is electroplated with copper.

Which statement about the process is correct?

Sanr

The concentration of copper ions in the electrolyte increases.
Copper is used as the cathode.

Copper ions gain electrons from the object being electroplated.
Oxygen is evolved at the anode.

Which reaction takes place when a photographic film is exposed to light?

SOW e

2Ag+Br > 2AgBr
Ag’te > Ag

Br te >2Br
Ag*+Br —AgBr

In the equilibrium reaction N, +3H, == 2NH,, which substance(s)
will be present in the equilibrium mixture?

San +

NH, only

N,, H, and NH,
N, andH, only
H, only

4024/1 Specimen paper

[Tum over

---

Page 8

Extracted Text

Which row correctly gives the correct number of protons, neutrons and electrons of
the ion.

ion protons | neutrons | electrons
A °Be** 4 5 4
B v F 9 10 10
Cc vA 13 14 13
D Ser 17 18 16

A solution of an alkali in water

A has a pH less than 7.

B turns blue litmus paper red.

Cc contains hydroxide ions.

D neutralises a salt to produce an acid.

What is the oxidation state of nitrogen in N,0,?

A +6
B 43
Cc -3
D -2

Which element is always found in steel?

A carbon

B chromium
Cc nickel

D silicon

Brass is an alloy of

A lead and tin.

B zinc and copper.

Cc iron and carbon.

D iron and aluminium.

Molten cryolite, NasA 1F¢, is used in the extraction of aluminium because

it lowers the melting point of aluminium oxide.

it dissolves the aluminium oxide.

it increases the melting point of aluminium oxide.
it increases the purity of aluminium.

SanY

4024/1 Specimen paper

---

Page 9

Extracted Text

A nitrogen

B carbon monoxide

Cc nitrogen oxide

D vaporised lead compounds

Which element is used to purify water for domestic purposes?

A iodine

B chlorine
Cc fluorine
D bromine

In the manufacture of sulphuric acid by the contact process, the sulphur trioxide is
dissolved in

A water.

B dilute sulphuric acid.

Cc concentrated sulphuric acid.
D oleum.

Which catalyst is used in the manufacture of nitric acid?

A vanadium pentoxide
B platinum

Cc iron

D nickel

What type of a compound is formed when an element P(proton number 12) reacts with
an element Q(proton number 177)

a covalent compound of formula PQ
a covalent compound of formula PQ2
an ionic compound of formula PQ2
anionic compound of formula P2Q

Soar

4024/1 Specimen paper

---

Page 10

Extracted Text

3 Which structure has an ester bond?

; 4 ;
a colt IR

oO oO
| |

B CL_to-—c —L_}+-0—c—-L_]

c [_}to—-L__}-0—-1_]

D CL_to— 0 —+_}0—o0-—-L_]

36 ~—_—«~Pollyethene and ethane have the same

A empirical formula.

B relative molecular mass.
Cc molecular formula.

D

reaction towards aqueous bromine.
37 The structure of a compound is shown.

ie
Hone eee On

HH H

The compound can be classified asan

acid and an alkene.
alcohol and an alkene.
acid and an alcohol.
ester and an alkene.

SOne

4024/1 Specimen paper

---

Page 11

Extracted Text

Which structure represents a soap molecule resulting from the hydrolysis of fat with
aqueous sodium hydroxide?

A CH3C— 0" Na’
O
B WW © —O Nat

O

C WW—CH, CH- CH,OH

OH

> jo x]

Which one is an advantage of using herbs over conventional medicines?

A herbs are readily available and cheaper
herbs are more effective

c herbs are not toxic

D

herbs are obtained in a natural form

Which method is not recommended for the disposal of non-biodegrable waste ?

A reusing

B bioremediation
Cc burning

D an esterification

4024/1 Specimen paper

---

Page 12

Extracted Text

SHEET

The Periodic Table of the Elements

Group
! ll Hl Iv Vv vi Vil fo)
1 4
H He
Hydrogen Helium
4
7 9 1 12 14 16 19 20
Li Be B c N oO F Ne
Lithium Berylium Boron Carbon Nitrogen Oxygen Fluorine Neon
3 6 8 9 10
23 24 27 28 34 32 35.5 40
Na Mg Al Si P Ss cl Ar
Sodium — | Magnesium Aurinium sticon | Phosphorus | Sulphur Chlorine ‘Argon
12 14 18 17 18
39 40 45 48 51 52 55 56 59° 59 64 65 70 73 75 79 80 84
K Ca Sc Ti Vv Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
Potassium | Calcium | Scanelium Titanium Vanadium | chromium | Manganese tren cobalt Nickel Copper Zine Gatium | Germanium | Arsenic Selenium Bromide Keypton
19 20 21 22 23 24 25 26 27 28 29 30 at 32 33 34 35 36
85 88 89 ca 93 96 101 103 106 108 112 115 119 122 128 127 131
Rb Sr Y zr Nb Mo Te Ru Rh Pd Ag Cd In Sn Sb Te I Xe
Rubidium ‘Strontium Yttrium Zirconium Niobium Molybdenum | Technetium Ruthenium, Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium lodine Xenon
37 38 39 40 at 42 43 45 46 47 48 49 50 54 53 54
133 137 139 178 181 184 186 190 192 195 197 201 204 207 209
Cs Ba La Hf Ta Ww Re Os Ir Pt Au Hg TL Pd Bi Po At Rn
Caesium Barium Lanthanum ‘Hafnium ‘Tantalum: Tungsten Rhenium Osmium Iridium Platinum: Gold Mercury: ‘Thallium: Lead Bismuth Polonium Astatine Radon
55 56 57 +) 72 7 74 75 76 7 78 7 80 81 82 83 54 85 86
226 227
Fr Ra Ac
Francium | Radium Actinium
87 88 89
: : 140 144 144 150 152 157 159 162 165 167 169 173 175
*58-71 Lanthanoid series
90-103 Actinoid seri Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu
- ctinold series Cerium Praseodymium | Neodymium Promethium ‘Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium
58 59 60 61 62 65 66 67 68 69 70 71
a a = relative atomic mass 72 28
Key x X= atomic symbol Th Pa U Np Pu Am cm Bk Cf Es Fm Md No Lr
b= a Sb ‘Thorium Protactinium Uranium: Neptunium Plutonium: Americium: Curium: Berkelium Californium: Einstenium Fermium Mendeleviurn ‘Nobelium Lawrencium:
b = proton (atomic) Number | gq 81 92 93 94 95 96 97 98 99 0 401 402 103

The volume of one mole of any gas is 28 dm’ at room temperature and pressure (r.t.p.)

4024/1 Specimen paper

---