chemistryqb topic1a mc e

7/23/2019 ChemistryQB Topic1a MC e

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Question Bank Topic 1

Planet Earth

Name: ___________________________ Class: ____________ Class No: __________

Mark: ___________ Date:______________

Multiple choice questions

Unit 1

1.3: Laboratory safety

1.4: Hazard warning labels

(CDC guide: Hazard warning labels and safety in laboratory

1 Which of the following hazard warning labels should be displaed on a bottle of a!ueous

chlorine"

2 Which of the following hazard warning labels should be displaed on a bottle containing

li!uefied petroleum gas"

# What is the meaning of the following hazard warning label"

$ %o&ic

' Carcinogen


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C Corrosi(e

D )armful

* Which of the following should N+% be done in a laborator"

$ Wash hands after e&periments,' -eep flammable chemicals awa from naked flames,

C Close all windows when doing e&periments,

D %urn off the 'unsen burner when it is not in use,

5 Which of the following hazard warning labels should be displaed on a bottle of dilute

hdrochloric acid"

6 Which of the following leads to .striking back/ of a 'unsen flame"

!u""ly of gas #ir hole

$ 0nsufficient )alf open

' 0nsufficient ull open

C 2ufficient Closed

D 2ufficient ull open

3 Which of the following hazard warning labels should be displaed on a bottle of carbon

mono&ide gas"

$ 415 onl

' 465 onl

C 415 and 4#5 onlD 465 and 4#5 onl

7 Which of the following substances are to&ic"

415 Canide

465 Mercur

4#5 Methanol

$ 415 and 465 onl

' 415 and 4#5 onl

C 465 and 4#5 onl

D 4158 465 and 4#5


3/33

9 %he following diagram is an e&perimental setup for preparing and testing a gas,

Which of the following actions can pre(ent .sucking back/ of the test solution"

(1) %urn off the burner before remo(ing the deli(er tube from the test solution,

465 ;emo(e the test solution before remo(ing the 'unsen flame,

4#5 0nsert the deli(er tube into a deep position of the test solution,

$ 415 onl' 465 onl

C 415 and 4#5 onl

D 465 and 4#5 onl

1< $ student conducts an e&periment using concentrated hdrochloric acid,

Which of the following precautions the student should take when working with the acid"

415 Wear safet glasses,

465 Wear protecti(e glo(es,

4#5 Do not warm the acid,

$ 415 and 465 onl

' 415 and 4#5 onl

C 465 and 4#5 onl

D 4158 465 and 4#5

11 Which of the following reagents is = are commonl stored in brown bottles"

415 Calcium

465 Concentrated nitric acid

4#5 2il(er nitrate solution

$ 415 and 465 onl

' 415 and 4#5 onl

C 465 and 4#5 onl

D 4158 465 and 4#5


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1.$: Co%%on a""aratus in the laboratory

(CDC guide: Co%%on a""aratus in the laboratory

1 Consider the e&perimental setup shown below:

Which of the following combinations concerning apparatus > and ? is correct"& '

$ @(aporating dish ;ack

' Aetri dish %ripod

C Aetri dish ;ack

D @(aporating dish %ripod

6 Consider the e&perimental setup shown below:

Which of the following combinations concerning apparatus >8 ? and B is correct"& '

$ lass rod 2tand unnel

' %hermometer 2tand Aetri dish

C lass rod %ripod unnel

D %hermometer %ripod Aetri dish

# Consider the e&perimental setup shown below:


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Which of the following combinations concerning apparatus > and ? is correct"

& '

$ Crucible Aipecla triangle

' Crucible Wire gauze

C Mortar Aipecla triangle

D Mortar Wire gauze

* Which of the following pieces of apparatus are in(ol(ed in filtering off insoluble solids from asolution"

415 Crucible

465 unnel

4#5 'eaker

$ 415 and 465 onl

' 415 and 4#5 onl

C 465 and 4#5 onl

D 4158 465 and 4#5

Which of the following pieces of apparatus can be used to measure the (olume of a solution"415 Measuring clinder

465 Aetri dish

4#5 %eat pipette

$ 415 onl

' 465 onl

C 415 and 4#5 onl

D 465 and 4#5 onl

6 ;efer to the following piece of apparatus containing two immiscible li!uids A and E,

Which of the following information can be deduced from the diagram shown abo(e"

415 A has a lower densit than E,

465 E is water,4#5 E is more soluble in water than A,


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$ 415 onl

' 465 onl

C 415 and 4#5 onl

D 465 and 4#5 onl

3 as > is insoluble in water, 0ts densit is lower than that of air, Which of the following setups

can be used to collect > prepared in an e&periment"

$ 415 and 465 onl

' 415 and 4#5 onl

C 465 and 4#5 onl

D 4158 465 and 4#5

7 Which of the following setups can be used to dr a moist gas"

$ 415 and 465 onl


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' 415 and 4#5 onl

C 465 and 4#5 onl

D 4158 465 and 4#5

Unit 6

).): Classifi*ation of %atter: "ure substan*e and %i+ture

).3: Ele%ents and *o%"ounds

(CDC guide: Classifi*ation of %atter , Ele%ents and *o%"ounds

1 Which of the following statements concerning elements is correct"

$ %here are thousands of elements on @arth,

' Compounds can Foin together chemicall to form elements

C @lements cannot be broken down into anthing simpler b chemical methods,

D Water is an element,

6 Which of the following statements concerning compounds is 0NC+;;@C%"

$ 2ugar is a compound,

' $ll compounds occur naturall in pure state,

C Compounds ha(e chemical properties different from their constituent elements,

D Compounds can onl be separated into its constituents b chemical methods,

# Which of the following comparisons between carbon dio&ide and a mi&ture of carbon and

o&gen is 0NC+;;@C%" Carbon dio+ide # %i+ture of *arbon and o+ygen

$ Colourless gas $ mi&ture of black solid and colourless gas

' +dourless +dourless

C i&ed composition Gariable composition

D 2upports combustion Does not support combustion

* )ow man elements does calcium carbonate consist of"

$ 6

' #

C *D

Which of the following substances is a compound"

$ 0ce

' Diamond

C 0ron

D 2ulphur

H Which of the following diagrams can represent a mi&ture"40n these diagrams8 and represent a carbon atom and an o&gen atom respecti(el,5


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3 Upon heating8 a mi&ture of iron and sulphur gi(es a black solid, Which of the following

statements concerning the black solid are correct"

415 0t is insoluble in water,

465 0t is an element,

4#5 0t reacts with dilute hdrochloric acid to gi(e a gas with a bad smell,

$ 415 and 465 onl

' 415 and 4#5 onl

C 465 and 4#5 onl

D 4158 465 and 4#5

7 Which of the following comparisons between water and a mi&ture of hdrogen and o&gen are

correct"

-ater # %i+ture of hydrogen and o+ygen

415 @&tinguishes a burning splint @&plodes when lighted with a burning splint

465 Colourless Colourless

4#5 $ li!uid at room temperature and $ gas at room temperature and pressure

pressure

$ 415 and 465 onl

' 415 and 4#5 onl

C 465 and 4#5 onl

D 4158 465 and 4#5

9 Which of the following comparisons between a mi&ture and a compound are correct"

i+ture Co%"ound

415 No or little energ change when it is @nerg is usuall gi(en out or absorbed formed, when it is formed,

, 465 Constituents must be separated b Constituents must be separated b phsical

chemical methods, methods,

4#5 Does not ha(e a sharp melting point, With a sharp melting point,

$ 415 and 465 onl

' 415 and 4#5 onl

C 465 and 4#5 onl

D 4158 465 and 4#5

1< Which of the following statements concerning compounds are correct"415 Compounds ha(e properties different from their constituent elements,


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465 Compounds ha(e (ariable composition,

4#5 Common salt is a compound,

$ 415 and 465 onl

' 415 and 4#5 onl

C 465 and 4#5 onl

D 4158 465 and 4#5

11 Which of the following substances is = are compound4s5"

415 +&gen

465 Water

4#5 $mmonia

$ 415 onl

' 465 onl

C 415 and 4#5 onl

D 465 and 4#5 onl

16 Which of the following substances is = are element4s5"

415 Carbon

465 Dr ice

4#5 2il(er

$ 415 onl

' 465 onl

C 415 and 4#5 onl

D 465 and 4#5 onl

1# Which of the following elements are present in sugar"

415 Carbon

465 Nitrogen

4#5 )drogen

$ 415 and 465 onl

' 415 and 4#5 onl

C 465 and 4#5 onl

D 4158 465 and 4#5

).4: /he at%os"here

(CDC guide: Co%"osition of air

1 Which of the following gases is least likel to be found in air"

$ $rgon

' )drogen

C Nitrogen

D Carbon dio&ide

6 Which of the following gases has the greatest percentage b (olume in air"


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$ +&gen

' Nitrogen

C Carbon dio&ide

D Noble gases

# Which of the following combinations is 0NC+;;@C%"

0as in air Co%"osition

$ +&gen 61I

' Nitrogen 37I

C Carbon dio&ide


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of li!uid air"

$ Nitrogen

' +&gen

C )drogen

D Noble gases

6 Which of the following statements concerning the fractional distillation of li!uid air is correct"

$ $ir is cooled to < JC,

' +&gen boils at K17# JC,

C Nitrogen gas is collected at the lower part of the fractionating column,

D Noble gases cannot be separated from air in the fractionating column,

# Wh can gases in air be separated b the fractional distillation of li!uid air"

$ %he gases ha(e different boiling points,

' %he gases ha(e different melting points,C %he gases ha(e different percentages b (olume in the air,

D %he gases ha(e different chemical properties,

* %he following table shows the boiling points of some gases present in the air,

0as oiling Point (oC

$rgon 17H

)elium 6H9

Neon 6*H

Nitrogen 19H

+&gen 17#Which of the gases would li!uef if the air is cooled to K6


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H Which of the following combinations concerning the functions of columns > and ? is correct"

Colu%n & Colu%n '

$ %o li!uef air %o purif air

' %o purif air %o li!uef air

C %o purif air %o remo(e noble gasesD %o remo(e noble gases %o li!uef air

3 Which of the following combinations concerning gases $ and ' are correct"

415 as $ takes the greatest percentage of air b (olume,

465 as ' can relight a glowing splint

, 4#5 %he boiling point of ' is lower than that of $,

$ 415 and 465 onl

' 415 and 4#5 onl

C 465 and 4#5 onl

D 4158 465 and 4#5

7 $rrange procedures for the separation of o&gen and nitrogen from air in order,

415 Li!uefaction of air

465 ractional distillation of air

4#5 Aurification of air

$ 4154654#5

' 4#5415465

C 4#5465415

D 4654154#5

9 Which of the following statements concerning the fractional distillation of li!uid air is = are

correct"

415 +&gen is obtained at a temperature lower than nitrogen

, 465 $ir should be purified before it is cooled to li!uid,

4#5 Noble gases can be obtained from the fractional distillation of li!uid air,

$ 415 onl

' 465 onl

C 415 and 4#5 onl

D 465 and 4#5 onl


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1< Which of the following substances can be obtained from the fractional distillation of li!uid

air" 415 Chlorine

465 +&gen

4#5 Nitrogen

$ 415 and 465 onl

' 415 and 4#5 onlC 465 and 4#5 onl

D 4158 465 and 4#5

).6: Physi*al and *he%i*al "ro"erties

(CDC guide: Physi*al and Che%i*al Pro"erties

1 Which of the following is N+% a phsical propert of carbon"

$ 0t is black in colour,' 0t is a solid at room temperature,

C 0t is denser than water,

D 0t can be burnt in air,

6 Which of the following is N+% a phsical propert of carbon dio&ide"

$ 0t is a gas at room temperature,

' 0t has no smell,

C 0t dissol(es in water to gi(e an acidic solution,

D 0t has a densit higher than o&gen,

# Which of the following is = are chemical propert4ies5 of water"

415 Water boils at 1 onl

D ? and B onl


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Which of the following properties of table salt are phsical properties"

415 0t is soluble in water,

465 0t has a salt taste,

4#5 2odium and chlorine are formed during the electrolsis of molten table salt,

$ 415 and 465 onl' 415 and 4#5 onl

C 465 and 4#5 onl

D 4158 465 and 4#5

).7: /est for o+ygen

(CDC guide: /est for o+ygen

1 Which of the following statements concerning o&gen is 0NC+;;@C%"$ +&gen relights a glowing splint,

' +&gen is a constituent element of water,

C +&gen is an element,

D $ir contains 37I of o&gen b (olume,

6 Which of the following shows the presence of o&gen in a Far"

$ 0t gi(es a pop sound with a burning splint,

' 0t turns limewater milk,

C 0t relights a glowing splint,

D 0t e&tinguishes a burning splint,

# Which of the following statements concerning o&gen is = are correct"

415 +&gen is flammable,

465 +&gen supports combustion,

4#5 +&gen relights a burning splint,

$ 415 onl

' 465 onl

C 415 and 4#5 onl

D 465 and 4#5 onl

* Which of the following statements concerning o&gen are correct"

415 +&gen is colourless,

465 +&gen is produced in the photosnthesis process,

4#5 $ clinder of o&gen should bear the hazard warning label shown below,

$ 415 and 465 onl

' 415 and 4#5 onl

C 465 and 4#5 onlD 4158 465 and 4#5


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Unit #

3.1: !ea water : a 8ast solution

3.: Co%"osition of sea water(CDC guide: Co%"osition of sea water

1 Which of the following substances is the most abundant in sea water"

$ 2odium chloride

' +&gen

C Minerals

D Water

6 Which of the following substances are present in sea water"415 2odium chloride

465 Dissol(ed gases

4#5 Minerals

$ 415 and 465 onl

' 415 and 4#5 onl

C 465 and 4#5 onl

D 4158 465 and 4#5

# Which of the following statements concerning sea water is = are correct"

415 2ea water is a mi&ture,465 2odium chloride is a sol(ent,

4#5 Water is a solute,

$ 415 onl

' 465 onl

C 415 and 4#5 onl

D 465 and 4#5 onl

3.): 9btaining *o%%on salt fro% sea water

3.3: 9btaining "ure water fro% sea water(CDC guide: E+tra*tion of *o%%on salt and isolation of "ure water fro% sea water

1 Which of the following statements is 0NC+;;@C%"

$ 2ea water is a compound containing sodium chloride,

' Aure water can be obtained from distillation of sea water,

C 2odium chloride is soluble in water,

D Mud can be remo(ed from sea water b filtration,

6 Consider the e&perimental setup below:


16/33

Which of the following combinations concerning the functions of > and ? is correct"

& '

$ %o speed up distillation %o condense (apour

' %o ensure e(en boiling %o condense (apour

C %o speed up distillation %o remo(e impuritiesD %o ensure e(en boiling %o remo(e impurities

# Which of the following methods can remo(e insoluble solids in water"

$ Crstallization

' iltration

C Distillation

D @(aporation

* Which of the following statements concerning the e(aporation of sea water is 0NC+;;@C%"$ @(aporation is a heat absorbing process,

' Water is remo(ed from sea water during e(aporation,

C Aure sodium chloride can be obtained,

D Aowder solid remained after e(aporation,

Which of the following methods can be used to obtain pure water from a copper4005 sulphate

solution"

$ iltration

' 2ublimation

C CrstallizaionD Distillation

H Which of the following processes occur in distillation"

$ Condensation followed b crstallization

' 2ublimation followed b e(aporation

C @(aporation followed b condensation

D @(aporation followed b sublimation

3 Which of the following statements concerning the crstallization process is 0NC+;;@C%"$ When the sol(ent of a solution e(aporates8 the remaining solution becomes concentrated,


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' During crstallization8 the solution is saturated,

C 0f the solution is e(aporated !uickl8 the crstals formed are usuall large,

D %he crstals formed can be separated from the solution b filtration,

7 Common salt has been mi&ed with sand, What is the correct se!uence of procedures forpurifing the common salt"

$ $dd water to the mi&ture8 filter and crstallize,

' $dd water to the mi&ture8 e(aporate and filter,

C @(aporate the mi&ture8 add water and crstallize,

D ilter the mi&ture8 e(aporate and crstallize,

9 Which of the following correctl describes the se!uence of procedures to separate copper8

sugar and water from a mi&ture of copper powder and sugar solution"

$ @(aporation8 crstallization

' iltration8 distillationC iltration8 e(aporation

D Crstallization8 filtration8 distillation

1< Which of the following statements concerning distillation of sea water using EuickfitO

apparatus is = are correct"

415 $ntibumping granules are added into sea water to remo(e impurities,

465 %he bulb of the thermometer should be placed near to the opening of the sidearm,

4#5 Cold water should enter the condenser at the upper end and lea(e at the lower end,

$ 415 onl

' 465 onlC 415 and 4#5 onl

D 465 and 4#5 onl

11 Which of the following processes can be used to obtain soluble substances from a solution"

415 iltration

465 Crstallization

4#5 @(aporation

$ 415 and 465 onl

' 415 and 4#5 onl

C 465 and 4#5 onlD 4158 465 and 4#5

12 Which of the following processes can be used to obtain large sodium chloride crstals from a

sample of sea water"

415 Crstallization

465 iltration

4#5 @(aporation

$ 415 onl

' 465 onl



18/33

1# Which of the following methods can be used to obtain copper4005 sulphate solids from

copper4005 sulphate solution"

415 Crstallization

465 Condensation4#5 @(aporation

$ 415 and 465 onl

' 415 and 4#5 onl

C 465 and 4#5 onl

D 4158 465 and 4#5

1* Which of the following pieces of apparatus are in(ol(ed in filtering off mud from a sample of

mudd sea water"

415 ilter paper

465 unnel4#5 Deli(er tube

$ 415 and 465 onl

' 415 and 4#5 onl

C 465 and 4#5 onl

D 4158 465 and 4#5

1 Which of the following pieces of apparatus are in(ol(ed in the distillation of sea water"

415 'unsen burner

465 Condenser

4#5 @(aporating dish$ 415 and 465 onl

' 415 and 4#5 onl

C 465 and 4#5 onl

D 4158 465 and 4#5

3.4: -hat does *o%%on salt *ontain

(CDC guide: /ests to show the "resen*e of sodiu% and *hloride in a sa%"le of

*o%%on salt

1 What colour can be obser(ed when a sample of sodium chloride solid is heated in a 'unsen

flame"

$ Aurple

' ;ed

C reen

D olden ellow

6 What would be obser(ed if sodium chloride solution is added to a solution containing dilute

nitric acid and sil(er nitrate solution"$ @ffer(escence occurs,


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' %here is no obser(able change,

C %he solution becomes blue in colour,

D $ white precipitate forms,

# Which of the following is N+% an essential step of flame test"$ Dip a clean nichrome wire into concentrated hdrochloric acid,

' Dip the nichrome wire into water,

C Dip the nichrome wire into powdered sample,

D )eat the nichrome wire in a 'unsen flame,

* Which of the following compounds does N+% gi(e a characteristic flame colour in flame test"

$ $luminium sulphate

' Copper4005 sulphate

C Aotassium sulphate

D 2odium sulphate

$ solid > gi(es a purple flame in flame test, > reacts with dilute hdrochloric acid to gi(e a

gas, > might be

$ potassium carbonate,

' potassium chloride,

C sodium carbonate,

D sodium chloride,

H Which of the following tests can be used to test for the presence of chloride in a solution"$ $dd dilute hdrochloric acid,

' $dd dilute sulphuric acid,

C $dd dilute nitric acid followed b sil(er nitrate solution,

D $dd dilute hdrochloric acid followed b barium chloride solution,

3 Which of the following methods can be used to distinguish between copper4005 sulphate

crstals and sodium chloride crstals"

415 Aerform a flame test on the crstals,

465 $dd dilute hdrochloric acid followed b barium chloride solution to their solutions,

4#5 +bser(e their colours,$ 415 and 465 onl

' 415 and 4#5 onl

C 465 and 4#5 onl

D 4158 465 and 4#5

7 Which of the following combinations concerning flame test is = are correct"

Co%"ound ;la%e *olour

415 Aotassium chloride reen

465 2odium chloride olden ellow

4#5 Calcium chloride 'lue$ 415 onl


20/33

' 465 onl

C 415 and 4#5 onl

D 465 and 4#5 onl

9 Which of the following tests can be used to show the presence of sodium chloride in solidsobtained from the e(aporation of sea water"

415 Aerform a flame test on the solids,

465 Dissol(es the solids in water, %hen add e&cess dilute nitric acid8 followed b sli(er nitrate

solution,

4#5 Alace a cobalt4005 chloride paper onto the solids,

$ 415 and 465 onl

' 415 and 4#5 onl

C 465 and 4#5 onl

D 4158 465 and 4#5

10 When dilute nitric acid and sil(er nitrate solution are added to a beaker containing an

unknown solution8 a white precipitate forms, %he unknown solution could be

415 sodium nitrate solution,

465 potassium chloride solution,

4#5 sea water,

$ 415 onl

' 465 onl

C 415 and 4#5 onl

D 465 and 4#5 onl

11 Which of the following statements are correct"

415 2il(er nitrate solution is used to test for the presence of chloride in a solution,

465 2odium carbonate gi(es a golden ellow flame in flame test,

4#5 2odium chloride is soluble in water,

$ 415 and 465 onl

' 415 and 4#5 onl

C 465 and 4#5 onl

D 4158 465 and 4#5

3.$: /est for the "resen*e of water in a sa%"le

(CDC guide: /est for the "resen*e of water in a sa%"le

1 When a piece of dr cobalt4005 chloride paper is placed on a sample of moist sodium chloride8

what will be obser(ed"

$ %he dr cobalt4005 chloride paper turns pink,

' %he dr cobalt4005 chloride paper turns blue,

C @ffer(escence occurs,

D %here is no obser(able change,


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6 Which of the following statements concerning copper4005 sulphate is 0NC+;;@C%"

$ Copper4005 sulphate is a compound,

' )drated copper4005 sulphate is blue,

C $nhdrous copper4005 sulphate is pink,

D Copper4005 sulphate is soluble in water,

# Which of the following can be used to test for the presence of water in a sample"

415 Dr cobalt4005 chloride paper

465 $nhdrous sodium chloride

4#5 $cidified sil(er nitrate solution

$ 415 onl

' 465 onl

C 415 and 4#5 onl

D 465 and 4#5 onl

* Which of the following statements concerning water are correct"

415 Water is a compound,

465 Water turns dr cobalt4005 chloride paper pink,

4#5 Water turns anhdrous copper4005 sulphate blue,

$ 415 and 465 onl

' 415 and 4#5 onl

C 465 and 4#5 onl

D 4158 465 and 4#5

Copper4005 sulphate crstals are warmed in a boiling tube as shown below, $ li!uid > iscollected in the test tube,

Which of the following statements concerning the e&periment are correct"

415 %he copper4005 sulphate crstals turn from blue to white upon warming,

465 Li!uid > is colourless,

4#5 Li!uid > can turn dr cobalt4005 chloride paper blue,

$ 415 and 465 onl

' 415 and 4#5 onl

C 465 and 4#5 onl

D 4158 465 and 4#5

3.6: 0etting useful substan*es fro% sea water


22/33

3.7: /he salt industry

(CDC guide: Ele*trolysis of sea water and uses of the "rodu*ts

1 Which of the following substances will N+% be obtained in the electrolsis of sea water"

$ +&gen' )drogen

C Chlorine

D 2odium hdro&ide

6 Which of the following statements concerning the electrolsis of sea water is correct"

$ 0t in(ol(es a chemical change,

' 0t produces o&gen,

C 0t gi(es pure sodium chloride,

D 0t gi(es elements onl,

# Which of the following is N+% a maFor use of hdrogen"

$ $s a fuel

' Manufacture of ammonia

C Manufacture of hdrochloric acid

D Manufacture of plastics

* Which of the following combinations concerning the products liberated in the electrolsis of

sea water is correct"

Positi8e ele*trode


23/33

3 Which of the following are maFor uses of chlorine"

415 2terilizing swimming pool water

465 Manufacture of soap

4#5 Manufacture of hdrochloric acid

$ 415 and 465 onl

' 415 and 4#5 onlC 465 and 4#5 onl

D 4158 465 and 4#5

7 Which of the following is = are maFor use4s5 of sodium hdro&ide"

415 Manufacture of bleach solution

465 $s a fuel

4#5 Manufacture of soap

$ 415 onl

' 465 onl


3.=: Physi*al and *he%i*al *hanges

(CDC guide: Physi*al and Che%i*al *hanges

1 Which of the following processes is a chemical change"

$ Aassing electricit through a copper wire

' Dissol(ing sugar in waterC 'urning a match

D Melting an iron obFect

6 Which of the following processes is N+% a phsical change"

$ $ glass cup breaks,

' @(aporate a sugar solution to obtain sugar crstals,

C Pewelr tarnishes,

D ilter mudd sea water,

#

Which of the following solids can be purified using the abo(e setup"

$ Lead4005 chloride

' 0odine


24/33

C Mercur

D Aotassium carbonate

* Which of the following processes is a chemical change"

$ Distilling sea water to obtain pure water' Whipping egg whites

C Mi&ing sea water with sil(er nitrate solution

D Magnetizing a compass needle

Which of the following processes are phsical changes"

415 ;usting of iron

465 ormation of dr ice from carbon dio&ide gas

4#5 @(aporation of sea water

$ 415 and 465 onl

' 415 and 4#5 onlC 465 and 4#5 onl

D 4158 465 and 4#5

H Which of the following processes are chemical changes"

415 @lectrolsis of water

465 Ahotosnthesis

4#5 )eating copper4005 sulphate crstals

$ 415 and 465 onl

' 415 and 4#5 onl

C 465 and 4#5 onlD 4158 465 and 4#5

3 Which of the following processes are phsical changes"

415 'read rising

465 )eating water

4#5 2ublimation of iodine

$ 415 and 465 onl

' 415 and 4#5 onl

C 465 and 4#5 onl

D 4158 465 and 4#5

Unit *

4.1: etals in the Earth>s *rust

(CDC guide: ?o*@s as a sour*e of %inerals

4.): E+tra*ting %etals fro% their ores

(CDC guide: Asolation of useful %aterials fro% %inerals as e+e%"lified by

e+tra*tion of %etals fro% their ores

1 Which of the following metals can be e&tracted from bau&ite"


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$ $luminium

' Copper

C Lead

D 0ron

6 Which of the following metals can be found free in the @arthOs crust"

$ 0ron

' Lead

C Magnesium

D 2il(er

# Which of the following combinations is correct"

etal


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7 Which of the following statements concerning rocks is = are correct"

415 $bout


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' %he solid reacts with water to gi(e slaked lime,

C %he solid is calcium hdro&ide,

D %he solid is a mi&ture,

# Which of the following statements concerning limewater is 0NC+;;@C%"$ Limewater is a colourless solution,

' Limewater is produced b dissol(ing calcium carbonate in e&cess water,

C Limewater is an a!ueous solution of calcium hdro&ide,

D Limewater becomes milk and then colourless when carbon dio&ide is bubbled into it

until e&cess,

* When carbon dio&ide is bubbled into limewater8 the solution becomes milk, 0t is due to the

formation of

$ calcium o&ide,

' calcium hdro&ide,C calcium chloride,

D calcium carbonate,

Which of the following solutions is used to test for carbon dio&ide gas"

$ Calcium carbonate solution

' Calcium hdro&ide solution

C Calcium chloride solution

D Calcium sulphate solution

H Which of the following substances would be produced when calcium carbonate is heated"

415 Carbon dio&ide

465 Calcium o&ide

4#5 Calcium hdro&ide

$ 415 and 465 onl

' 415 and 4#5 onl

C 465 and 4#5 onl

D 4158 465 and 4#5

3 Which of the following methods can be used to produce limewater"415 Dissol(e calcium carbonate in e&cess water,

465 Dissol(e !uicklime in e&cess water,

4#5 )eat a marble and dissol(e the solid formed in e&cess water,

$ 415 onl

' 465 onl

C 415 and 4#5 onl

D 465 and 4#5 onl

7 Limestone is heated for about 1 minutes in an e&periment,


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Which of the following statements concerning the e&periment are correct"

415 $ colourless gas is produced,

465 Euicklime remains in the test tube after heating,

4#5 %he limewater turns milk,

$ 415 and 465 onl

' 415 and 4#5 onl

C 465 and 4#5 onl

D 4158 465 and 4#5

(CDC guide: /ests to show the "resen*e of *al*iu% and *arbonate in a sa%"le of

li%estone B *hal@ B %arble

1 When a piece of marble is heated in a 'unsen flame8 which of the following flame colours

would be obser(ed"

$ olden ellow

' 'rickredC reen

D Aurple

6 When calcium carbonate is added to dilute hdrochloric acid8 a gas is e(ol(ed, Which of the

following statements concerning the gas is correct"

$ %he gas is e&plosi(e,

' %he gas gi(es a popO sound with a burning splint,

C %he gas relights a glowing splint,

D %he gas turns limewater milk,

# %o identif an unknown powder8 a student heated the powder in a 'unsen flame, $ brickred

flame was obser(ed, When the powder was added to dilute hdrochloric acid8 it dissol(ed

without an obser(able changes, What might the powder be"

$ Calcium carbonate

' 2odium carbonate

C Calcium chloride

D 2odium chloride

Dire*tions: uestions 4 and $ refer to the diagra% below.


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* What should gas > and solid ? be"

& '$ Carbon dio&ide Calcium carbonate

' +&gen Calcium carbonate

C Carbon dio&ide Calcium o&ide

D )drogen Calcium o&ide

What would be obser(ed if e&cess gas > is bubbled into limewater"

$ @ffer(escence occurs,

' 2olid ? dissol(es,

C %he solution becomes ellow in colour,

D %here is no obser(able change,

H %he following word e!uation represents a reaction of calcium carbonate:

Calcium carbonate Q > ? Q B Q carbon dio&ide

Which of the following combinations is correct"

& '

$ Dilute hdrochloric acid Calcium o&ide Calcium hdro&ide

' Dilute hdrochloric acid Calcium chloride Water

C Water Calcium hdro&ide Calcium o&ide

D Water Calcium o&ide Calcium chloride

3 Which of the following processes would N+% produce carbon dio&ide"

$ ;espiration

' Ahotosnthesis

C )eating limestone strongl

D $dding calcium carbonate to dilute hdrochloric acid

7 When calcium carbonate is dissol(ed in dilute hdrochloric acid8 which of the following

substances would be formed"

415 Calcium hdro&ide465 Carbon dio&ide

4#5 Water

$ 415 and 465 onl

' 415 and 4#5 onl

C 465 and 4#5 onl

D 4158 465 and 4#5

9 What would be obser(ed when a piece of limestone is added to dilute hdrochloric acid"

415 as bubbles e(ol(e,

465 %he limestone dissol(es,4#5 %he acid solution turns milk,


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$ 415 and 465 onl

' 415 and 4#5 onl

C 465 and 4#5 onl

D 4158 465 and 4#5

1< Which of the following statements concerning the products formed from heating limestone are

true"

415 %he gas e(ol(ed turns limewater milk,

465 %he solid formed is white in colour,

4#5 %he solid formed gi(es a brickred flame in flame test,

$ 415 and 465 onl

' 415 and 4#5 onl

C 465 and 4#5 onl

D 4158 465 and 4#5

11 $ gas is e(ol(ed when a piece of marble is added to dilute hdrochloric acid, Which of the

following statements concerning the gas are correct"

415 %he gas turns limewater milk,

465 %he gas e&tinguishes a fire,

4#5 %he gas dissol(es in water to form an acidic solution,

$ 415 and 465 onl

' 415 and 4#5 onl

C 465 and 4#5 onl

D 4158 465 and 4#5

16 Which of the following tests can be used to show the presence of calcium carbonate in chalk"

415 Conduct flame test,

465 $dd chalk into dilute nitric acid8 followed b sil(er nitrate solution,

4#5 $dd chalk into dilute hdrochloric acid and test the gas e(ol(ed with limewater,

$ 415 onl

' 465 onl

C 415 and 4#5 onl

D 465 and 4#5 onl

1# Which of the following statements concerning limestone are correct"415 Limestone is soluble in water,

465 Limestone is soluble in dilute hdrochloric acid,

4#5 Limestone decomposes on heating,

$ 415 and 465 onl

' 415 and 4#5 onl

C 465 and 4#5 onl

D 4158 465 and 4#5

1* Which of the following reactions would produce a white precipitate"

415 Mi& sil(er nitrate solution with sodium chloride solution,465 $dd calcium carbonate to dilute hdrochloric acid,


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4#5 'ubble carbon dio&ide gas into calcium hdro&ide solution,

$ 415 onl

' 465 onl

C 415 and 4#5 onl

D 465 and 4#5 onl

1 Which of the following methods can be used to distinguish between solid sodium carbonate

and solid calcium carbonate"

415 %esting the solubilit of the solids in water

465 +bser(ing the colour of the solids

4#5 $dding dilute hdrochloric acid and testing the gaseous product with limewater

$ 415 onl

' 465 onl

C 415 and 4#5 onl

D 465 and 4#5 onl

4.4: ;or%ation of *hal@ li%estone and %arble

(CDC guide: Li%estone *hal@ and %arble as different for%s of *al*iu%

*arbonate

1 Which of the following statements concerning calcium carbonate is 0NC+;;@C%"

$ Limestone8 chalk and marble are different forms of calcium carbonate,

' Marble is the cheapest among different forms of calcium carbonate,

C Chalk is originated from remains of sea animals with shells,D Calcium carbonate contains calcium8 carbon and o&gen,

6 Which of the following combinations concerning the hardness of different forms of calcium

carbonate is correct"

!oftest Hardest

$ Chalk Limestone

' Limestone Marble

C Chalk Marble

D Limestone Chalk

# Which of the following statements concerning chalk is correct"

$ Chalk is originated from remains of plants,

' Chalk is used to manufacture plastics,

C Chalk is softer than marble,

D Chalk is an element,

* What is the purpose of adding slaked lime to soil"

$ %o kill microorganisms in the soil,

' %o neutralize the acidit of the soil,C %o increase the plant growth rate,


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D %o increase the amount of calcium in plants,

Which of the following are uses of limestone"

415 Manufacture of cement

465 Manufacture of glass4#5 Manufacture of soap

$ 415 and 465 onl

' 415 and 4#5 onl

C 465 and 4#5 onl

D 4158 465 and 4#5

H Which of the following statements concerning marble is = are correct"

415 Marble is formed from limestone under high temperature and pressure,

465 Marble is soluble in water,

4#5 Marble has a low melting point,$ 415 onl

' 465 onl

C 415 and 4#5 onl

D 465 and 4#5 onl

3 Which of the following are uses of !uicklime"

415 %o neutralize acidit in soil,

465 $s a dring agent in industr,

4#5 0n making steel from iron,

$ 415 and 465 onl' 415 and 4#5 onl

C 465 and 4#5 onl

D 4158 465 and 4#5

4.$: ;or%ation of li%estone *a8es

(CDC guide: Erosion "ro*esses as e+e%"lified by the a*tion of heat water and

a*ids on *al*iu% *arbonate

1 Which of the following can erode limestone"

415 Wind

465 ;unning water

4#5 ra(it

$ 415 and 465 onl

' 415 and 4#5 onl

C 465 and 4#5 onl

D 4158 465 and 4#5

6 Which of the following e&plain4s5 wh rainwater can erode limestone"415 Limestone is soluble in water,


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465 Carbon dio&ide in air dissol(es in rainwater to form carbonic acid which dissol(es

limestone,

4#5 Limestone reacts with water to form soluble calcium hdro&ide,

$ 415 onl

' 465 onl


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