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Question Bank Topic 5
Question Bank Topic 6Products from Important ProcessesName: ___________________________ Class: ____________ Class No: __________Mark: ___________Date:______________
Multiple choice questions
Unit 2222.1: The chloro-alkali industry22.2: Chlorine bleach22.3: Uses of chlorine and sodium hypochlorite(CDC guide: Uses of chlorine and hypochlorite)
1Which of the following is NOT an industrial use of chlorine?
AMaking domestic bleaches
BProducing hydrochloric acid
CMaking cooking salt
DManufacturing PVC plastic
2Which of the following is commonly used as a household germicide?
AVinegar
BBaking soda solution
CBrine solution
DChlorine bleach3Chlorine is added to drinking water to
Aprevent tooth decay.
Bbleach the water.
Ckill germs in water.
Dsettle any suspended particles in water.
4Which of the following are uses of chlorine?
(1)To make PVC plastic.
(2)To sterilize drinking water and water in swimming pools.
(3)To make chlorine bleach.
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
5Which of the following statements concerning chlorine bleach are correct?
(1)It is prepared by reacting chlorine with sodium hydroxide solution.
(2)Chloride ion is the active ingredient in chlorine bleach.
(3)It gives a smell of chlorine gas.
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
6Which of the following statements concerning halogens are correct?
(1)Compounds of fluorine are added to tap water to help prevent tooth decay.
(2)Tincture of iodine is used as an antiseptic.
(3)Iodine may be added to table salt for nutrition purpose.
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
22.4: Manufacture of chlorine by electrolysis of brine(CDC guide: Manufacture of chlorine by electrolysis of brine)
1Brine is electrolysed in the set-up as shown below for some time, until gas is collected fully ineither tube A or tube B.
A bleaching solution can be made by mixing
Agas from tube A and the resulting solution from the electrolytic cell.
Bgas from tube B and the resulting solution from the electrolytic cell.
Cgas from tube A and brine.
Dgas from tube B and brine.Directions: Questions 2 and 3 refer to the flow diagram showing products fromelectrolysis of brine.
2Which of the following statements concerning X is correct?
AIt is colourless.
BIt is very soluble in water but insoluble in organic solvents.
CIt can react with potassium bromide solution to form bromine.
DIt is a reducing agent.
3Y is
Aoxygen.
Bsodium sulphate.
Csodium chloride.
Dsodium hydroxide.
4Consider the membrane cell shown below.
During electrolysis, the membrane only allows passage of sodium ions across the twochambers to complete the circuit. Solution X is probably
Aa mixture of sodium chloride solution and sodium hydroxide solution.
Bhydrochloric acid.
Cdistilled water.
Dsodium hydroxide solution.
5Chlorine CANNOT be produced by
Aadding bromine to sodium chloride solution.
Belectrolysis of brine using carbon electrodes.
Cadding concentrated hydrochloric acid to potassium permanganate solution.
Delectrolysis of molten calcium chloride.
6Chlorine and sodium hydroxide are manufactured from the chloro-alkali industry.
What are the other important products?
(1)Hydrogen gas
(2)Hydrogen chloride gas and hydrochloric acid
(3)Sodium chloride
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
7Which of the following statements concerning the electrolysis of brine using a mercuryelectrolytic cell is / are correct?
(1)Chlorine is produced at the cathode.
(2)The anode is made of graphite.
(3)Sodium hydroxide solution is produced.
A(1) only
B(2) only
C(1) and (3) only
D(2) and (3) only
Directions: Questions 8 and 9 refer to a mercury electrolytic cell as illustrated below:
8Which of the following statements about the mercury electrolytic cell is INCORRECT?
AMercury acts as the anode in the electrolytic process.
BThe used brine contains a high concentration of sodium chloride.
CChlorine and sodium hydroxide would be obtained.
DMercury may lose to the environment, causing serious pollution problems to the areasnearby.
9The sodium liberated dissolves in mercury to form sodium amalgam. The amalgam flows intoa second cell, where it reacts with water to give
(1)hydrogen gas.
(2)sodium hydroxide solution.
(3)mercury.
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
22.5: Chlorine - a Group VII element22.6: Chemical properties of chlorine22.7: Test for chlorine(CDC guide: Properties and reactions of chlorine: (a) bleaching action ofaqueous chlorine, (b) reactions with aqueous halides, (c) reaction with dilutesodium hydroxide solution)
1A greenish-yellow gas, which is denser than air, does not burn or support a burning splint.What might the gas be?
ACarbon dioxide
BChlorine
CNitrogen monoxide
DHydrogen
2Which of the following statements concerning halogens is INCORRECT?
ATheir colours deepen down the group.
BTheir densities increase down the group.
CTheir solubilities in water increase down the group.
DTheir melting points increase down the group.
3A piece of moist blue litmus paper is placed in a jar of chlorine gas. The paper turns
Awhite only.
Bred only.
Cwhite and then red.
Dred and then white.
4Chlorine is usually stored and transported in liquefied state in steel cylinders.
Which of the following hazard warning labels should be displayed on a chlorine cylinder?
5Which of the following about chlorine gas is correct?
AIt is an acidic gas.
BIt has a sweet smell.
CIt is insoluble in water.
DIt has no effect on moist pH paper.
6Iron(II) sulphate solution is mixed with aqueous chlorine. Excess ammonia solution is then
added to the mixture. What would be the colour of the precipitate formed?
ABrown
BGreen
CYellow
DWhite
7Aqueous chlorine is a bleaching agent because
Aaqueous chlorine contains hypochlorous acid.
Baqueous chlorine is acidic.
Cchlorine is corrosive.
Dchlorine is a strong reducing agent.
8A solution of chlorine in heptane is shaken with an aqueous solution of a compound X in a testtube. On standing, two layers are formed and the upper layer is purple in colour. X may be
Asodium fluoride.
Bsodium bromide.
Csodium iodide.
Dsodium sulphite.
9Which method is most suitable for obtaining bromine from a sodium bromide solution?
AAdding aqueous chlorine to it
BAdding sodium hydroxide solution to it
CHeating the solution
DAdding dilute sulphuric acid to it
10Which of the following is correct when aqueous chlorine is added to aqueous sodium iodidewith some starch solution?
AThe solution turns brown.
BA purple vapour is given off.
CThe solution turns dark blue.
DThere is no observable change.
11Solutions containing chloride ion and bromide ion can be distinguished by adding
Aheptane.
Bdilute potassium iodide solution.
Caqueous chlorine.
Daqueous bromine.
12A sample of hydrogen chloride contains trace amount of chlorine gas. Which of the followingis the best way to verify the presence of chlorine gas in the sample?
ATest the sample with dilute sodium sulphite solution.
BDissolve the sample into water and test the pH value of the solution with a pH meter.
CTest the sample with a piece of filter paper soaked with acidified potassium dichromatesolution.
DTest the sample with a piece of filter paper soaked with potassium iodide solution.
13Which of the following solutions can decolourize aqueous bromine?
ASodium chloride solution
BSodium iodide solution
CSodium sulphate solution
DSodium sulphite solution
14The manufacture of bleaching solution from the reaction between chlorine gas and sodiumhydroxide solution can be illustrated by the following equation:
Cl2(g) + 2NaOH(aq) NaCl(aq) + NaOCl(aq) + H2O(l)
In the reaction,
Achlorine is simultaneously oxidized and reduced.
Bsodium hydroxide is simultaneously oxidized and reduced.
Cchlorine is reduced and sodium hydroxide is oxidized.
Dchlorine is oxidized and sodium hydroxide is reduced.
15Which of the following statements concerning the bleaching action of chlorine isINCORRECT?
AThe bleaching action of chlorine is due to its oxidizing property.
BChlorine can turn a piece of dry pH paper red and then colourless.
CChlorine does not show its bleaching power in the absence of water.
DThe bleaching action of chlorine is permanent.
16Aqueous chlorine is added to a test tube containing potassium bromide solution and heptane.Which of the following diagrams shows the expected result of the experiment?
17Which of the following is the strongest oxidizing agent?
ABromine
BChlorine
CIodine
DHydrogen bromide
18Which of the following statements concerning halogens is INCORRECT?
AFluorine is a strong oxidizing agent.
BAqueous chlorine is colourless.
CBromine is a volatile liquid.
DIodine vapour is purple in colour.
19In what order does the reducing power of the hydrogen halides increase?
AHCl < HBr < Hl
BHCl < Hl < HBr
CHBr < Hl < HCl
DHl < HBr < HCl
20Which of the following statements about chlorine are correct?
(1)It is greenish-yellow in colour.
(2)It is very toxic.
(3)It is a reducing agent.
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
21Which of the following set-up can be used to dry chlorine gas using concentrated sulphuricacid?
A(1) only
B(2) only
C(1) and (3) only
D(2) and (3) only
Directions: Questions 22 and 23 refer to the following reaction:2I-(aq) + Br2(aq) 2Br-(aq) + I2(aq)
22The reaction is a
(1)displacement reaction.
(2)redox reaction.
(3)substitution reaction.
Which of the above are correct?
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
23Which of the following statements about the reaction are correct?
(1)I-(aq) acts as a reducing agent.
(2)Br2(aq) is a stronger oxidizing agent than I-(aq).
(3)Br2(aq) is reduced.
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
24Which of the following is / are correct when chlorine gas is bubbled into potassium iodidesolution?
(1)The solution turns brown.
(2)The iodide ions are reduced by chlorine.
(3)A purple gas is given off.
A(1) only
B(2) only
C(1) and (3) only
D(2) and (3) only
25In which of the following reactions does chlorine act as an oxidizing agent?
(1)CH4(g) + Cl2(g) CH3Cl(g) + HCl(g)
(2)2Br-(aq) + Cl2(aq) Br2(aq) + 2Cl-(aq)
(3)2NH3(g) + 3Cl2(g) N2(g) + 6HCl(g)
(4)2Fe2+(aq) + Cl2(g) 2Fe3+(aq) + 2Cl-(aq)
A(4) only
B(1), (2) and (3) only
C(2), (3) and (4) only
D(1), (2), (3) and (4)
26Which of the following statements concerning chlorine are correct?
(1)Chlorine is toxic.
(2)Chlorine has a higher density than air.
(3)Chlorine dissolves in sodium hydroxide solution readily.
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
27Which of the following species are present in aqueous chlorine?
(1)Chloride ions
(2)Hypochlorous acid
(3)Chlorine
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
28Which of the following statements concerning aqueous chlorine are correct?
(1)Aqueous chlorine is an acidic solution.
(2)Aqueous chlorine bleaches by oxidation.
(3)The bleaching action of aqueous chlorine is due to the presence of hydrochloric acid.
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
29Which of the following substances will be produced when chlorine gas is dissolved in dilutesodium hydroxide solution?
(1)Hypochlorous acid
(2)Sodium hypochlorite
(3)Water
A(1) only
B(2) only
C(1) and (3) only
D(2) and (3) only
30Which of the following substances can react with chlorine?
(1)Sulphurous acid
(2)Concentrated sulphuric acid
(3)Acidified potassium permanganate solution
A(1) only
B(2) only
C(1) and (3) only
D(2) and (3) only
31Which of the following substances will react with bromine water?
(1)Potassium iodide solution
(2)Sodium chloride solution
(3)Sodium sulphite solution
A(1) only
B(2) only
C(1) and (3) only
D(2) and (3) only
32Which of the following statements concerning iodine is / are correct?
(1)A solution of iodine in heptane is brown in colour.
(2)Aqueous iodine gives a deep blue colour with starch solution.
(3)Dissolving iodine in potassium iodide solution gives a brown solution.
A(1) only
B(2) only
C(1) and (3) only
D(2) and (3) only
33Which of the following hazard warning labels should be displayed on a bottle of liquidbromine?
A(1) only
B(2) only
C(1) and (3) only
D(2) and (3) only
22.8: Chemical properties of sodium hypochlorite(CDC guide: Sodium hypochlorite as the active ingredient in chlorine bleach; Properties and reactions of sodium hypochlorite: (a) bleaching action, (b) reaction with dilute acids)
1Which of the following statements concerning household bleach is correct?
AHousehold bleach can be used as a drain opener.
BThe active ingredient of household bleach is sodium hydroxide.
CThe raw material for manufacturing household bleach is sodium chloride.
DHousehold bleach is produced by dissolving chlorine in water.
2Hypochlorite bleach should NOT be used in acidic solution because
Aacid attacks cloth and damages it.
Btoxic chlorine would be produced.
Ca precipitate would be formed.
Dthe bleach would be decomposed.
Directions: Questions 3 and 4 refer to the following experiment:
3What gaseous product is formed in the flask?
AHydrogen
BOxygen
CChlorine
D Carbon dioxide
4What would happen to the iron(II) sulphate solution?
AA green emulsion forms.
BThe solution changes from green to yellow.
CA brown precipitate forms.
DThere is no observable change.5Which of the following statements concerning chlorine is INCORRECT?
AIt can kill germs.
BIt can decolourize aqueous bromine.
CIt can bleach coloured stains.
DIt can be produced by the reaction between dilute sulphuric acid and bleach solution.
6Chlorine bleach should be kept in a cool place because at high temperature
Atoxic chlorine gas will be given off.
Bexplosion will occur.
Cchlorine bleach will decompose faster.
Dhydrochloric acid will be produced.
7When dilute hydrochloric acid is added to solution X, a greenish yellow gas with a pungentsmell is given off. Solution X may be
Asodium hydroxide solution.
Bsodium hydrogencarbonate solution.
Csodium hypochlorite solution.
Dsodium sulphite solution.
8In which of the following processes will chlorine be liberated?
(1)Adding aqueous bromine to potassium chloride solution
(2)Adding dilute sulphuric acid to aqueous chlorine
(3)Adding acidic toilet cleaner to chlorine bleach
A(1) only
B(2) only
C(1) and (3) only
D(2) and (3) only
9Common household bleaches include
(1)sodium hypochlorite solution.
(2)calcium hypochlorite powder.
(3)sulphurous acid.
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
10Which of the following about the bleaching action of hypochlorite ion is / are correct?
(1)It bleaches by reduction.
(2)Its bleaching efficiency will decline when exposed under sunlight.
(3)Its bleaching action is very slow.
A(1) only
B(2) only
C(1) and (3) only
D(2) and (3) only
11Chlorine bleach
(1)can irritate our skin.
(2)can be used as a germicide.
(3)may damage delicate materials such as silk and paper.
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
12Which of the following can be damaged by household bleach?
(1)Wool
(2)Silk
(3)Paper
A(1) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
13Which of the following statements concerning chlorine household bleach are correct?
(1)The active ingredient is OCl-(aq) ion.
(2)It is suitable for bleaching cotton.
(3)It is produced by dissolving chlorine in water.
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
14Which of the following experiments would produce a gas?
(1)Adding water to a solid mixture of citric acid and sodium carbonate
(2)Adding dilute hydrochloric acid to sodium hypochlorite solution
(3)Adding aqueous chlorine to sodium iodide solution
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
15Which of the following substances will react with chlorine bleach to give a gas?
(1)Dilute hydrochloric acid
(2)Calcium carbonate
(3)Vinegar
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
Directions: Questions 16 to 18 refer to the following diagram:
Gas M is formed by adding dilute hydrochloric acid to the bleaching solution. Then, the gas is dissolved in water to form solution N.16Which of the following about gas M is INCORRECT?
AIt is very soluble in organic solvents (e.g. hexane).
BIt is colourless.
CIt exists as diatomic molecules.
DIt is toxic.
17Which of the following species are present in solution N?
(1)Hydrogen ions
(2)Chlorine molecules
(3)Hypochlorous acid
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
18A piece of blue litmus paper is placed in solution N. The colour of litmus paper turns
Awhite only.
Bred only.
Cred and then white.
Dwhite and then red.
Directions: Questions 19 and 20 refer to the following experiment.Chlorine is prepared using the set-up shown below. Reagent X is added to the bleaching solution inthe flask.
19Which of the following statements concerning the experiment are correct?
(1)Reagent X may be dilute hydrochloric acid.
(2)A greenish-yellow gas forms in the flask.
(3)The bleaching solution turns orange.
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
20Which of the following collection methods can be used to collect the gas given off?
21The main chemical constituent of bleaching powder is calcium hypochlorite. Which of thefollowing statements concerning bleaching powder are correct?
(1)It can be used as a domestic sterilizing agent.
(2)It reacts with acids readily to give chlorine.
(3)It is produced by passing chlorine into slaked lime.
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
22.9: Potential hazards associated with the use of chlorine bleach(CDC guide: Potential hazards associated with the use of chlorine bleach)
1Which of the following should NOT be done when handling chlorine bleach?
ADilute chlorine bleach with water.
BMix chlorine bleach with acidic substances.
CKeep chlorine bleach in a cool place.
DWear gloves when handling chlorine bleach.
2When chlorine bleach is exposed to sunlight for some time, gas X is collected.
Gas X
Agives a pop sound with a burning splint.
Bcan relight a glowing splint.
Ccan turn moist blue litmus paper red and then white.
Dis brown in colour.
3Which of the following are problems associated with the use of chlorine bleach?
(1)The colour of an object bleached by chlorine bleach would be restored when exposed toair for some time.
(2)Chlorine bleach may cause irritation to the skin.
(3)Industrial chlorine bleach discharged into the sewage would harm marine life.
A(1) only
B(2) only
C(1) and (3) only
D(2) and (3) only4Which of the following are correct ways for handling chlorine bleach?
(1)Dilute the bleach before use.
(2)Keep the bleach in cool place.
(3)Do not add any acidic substances to the bleach.
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
5Which of the following would happen when aqueous chlorine is kept at 70 for an hour?
(1)It turns from greenish-yellow to colourless gradually.
(2)A gas which relights a glowing splint is given off.
(3)It loses its bleaching ability.
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
Unit 2323.1: Uses of sulphuric acid23.2: Uses of sulphur dioxide(CDC guide: Uses of sulphuric acid and sulphur dioxide)
1Sulphuric acid is NOT used in
Amaking white paint.
Bmaking fertilizers.
Cmaking window cleaners.
Dmaking soapless detergents.
2The major use of sulphuric acid is in
Acleaning metals for plating.
Bmaking fertilizers.
Cmaking dyestuffs.
Dmaking fibres and transparent films.
3Sulphur dioxide is used
(1)as an industrial bleach.
(2)as a preservative.
(3)in manufacturing sulphuric acid.
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
23.3: Manufacture of sulphuric acid - the Contact process(CDC guide: Manufacture of sulphuric acid by the Contact process)
1The following illustration represents the production of sulphuric acid by the Contact process.
(1) (2) (3) (4)
S SO2 SO3 H2S2O7 H2SO4
Which step involves the greatest change in the oxidation number of sulphur?
A(1)
B(2)
C(3)
D(4)
2What is the catalyst most commonly used in the Contact process?
AIron
BNickel
CVanadium(V) oxide
DZinc oxide
3Which of the following scheme best illustrates the Contact process?
AS SO2 SO3 H2SO4
BS SO2 SO3 H2S2O7 H2SO4
CS SO3 H2S2O7 H2SO4
DS SO2 H2SO3 H2S2O7 H2SO4Directions: Questions 4 and 5 refer to the following flow diagram.
A part of the flow diagram for the Contact process is shown below:
4W is
Airon pyrite.
Bsulphur dioxide.
Csulphur trioxide.
Dzinc blende.
5Which of the following combination is correct?
X
Y
Z
ASulphur dioxideWater
Concentrated sulphuric acid
BSulphur dioxideConcentrated sulphur acidOleum
CSulphur trioxideConcentrated sulphur acidOleum
DSulphur trioxideWater
Concentrated sulphuric acid
Directions: Questions 6 and 7 refer to the following flow scheme for the production ofsulphuric acid using the Contact process.
Stage 1
Stage 2
Stage 3
Stage 4
ZnS SO2 SO3 2S2O7 H2SO46Which of the following stages involved the largest change in oxidation number of sulphur?
AStage 1
BStage 2
CStage 3
DStage 4
7Which of the following statements concerning the Contact process is correct?
AA gaseous mixture of sulphur dioxide and oxygen in the mole ratio of 1:2 is used inStage 2.
BNo catalyst is required for Stage 2.
CWater is used to react with SO3 in Stage 3.
DHeat energy is liberated in Stage 4.
8Why is sulphur trioxide produced in the Contact process NOT dissolved in water directly?
ASulphur trioxide dissolves in water to give a highly toxic solution.
BSulphur trioxide is insoluble in water.
CDissolving sulphur trioxide in water will give a mist of sulphuric acid which is difficult tocollect.
DSulphur trioxide does not react with water.
9Which of the following statements concerning sulphur trioxide is correct?
ASulphur trioxide is insoluble in concentrated sulphuric acid.
BIn the Contact process, sulphur trioxide is absorbed by concentrated sulphuric acidinstead of water.
CSulphur trioxide reacts slowly with water.
DSulphur trioxide is also known as fuming sulphuric acid.10Which of the following is NOT a raw material for the production of sulphur dioxide in theContact process?
AS
BFeSO3
CFeS2
DZnS11In Contact process, oleum is formed by
Adissolving sulphur dioxide in concentrated sulphuric acid.
Bdissolving sulphur dioxide in water.
Cdissolving sulphur trioxide in concentrated sulphuric acid.
Ddissolving sulphur trioxide in water.
12Which of the following statements concerning the production of sulphuric acid in the Contactprocess is INCORRECT?
AConversion of sulphur dioxide to sulphur trioxide is a reversible reaction.
BSulphur dioxide can be produced by roasting zinc sulphide.
CVanadium(V) oxide is used as a catalyst in the conversion of sulphur trioxide to sulphuricacid.
DThe reaction temperature for Contact process is about 450.13Which of the following statements concerning oleum is INCORRECT?
AThe reaction between oleum and water is exothermic.
BOleum is called fuming sulphuric acid.
CThe oxidation number of sulphur in oleum and that in sulphuric acid are the same.
DA catalyst is required in the formation of oleum from sulphur trioxide.
14Which of the following statements concerning sulphur trioxide is / are correct?
(1)The oxidation number of sulphur in sulphur trioxide is +6.
(2)When sulphur trioxide is added to water, a redox reaction occurs.
(3)Sulphur trioxide dissolves in concentrated sulphuric acid readily.
A(1) only
B(2) only
C(1) and (3) only
D(2) and (3) only
15In the Contact process, sulphur dioxide is prepared by
(1)roasting iron pyrite in air.
(2)heating copper with concentrated sulphuric acid.
(3)burning sulphur directly in air.
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
16Which of the following processes require(s) the use of catalyst?
(1)Oxidation of sulphur dioxide to sulphur trioxide
(2)Manufacture of sodium hypochlorite by reacting chlorine with sodium hydroxide solution
(3)Electrolysis of acidified water
A(1) only
B(2) only
C(1) and (3) only
D(2) and (3) only
17Which of the following can be used as a catalyst in the production of sulphur trioxide fromsulphur dioxide?
(1)Iron
(2)Vanadium(V) oxide
(3)Platinum
A(1) only
B(2) only
C(1) and (3) only
D(2) and (3) only
18Which of the following reactions may be involved in the Contact process?
(1)2ZnS(s) + 3O2(g) 2ZnO(s) + 2SO2(g)
(2)2SO2(g) + O2(g) 2SO3(g)
(3)SO3(g) + H2O(l) H2SO4(l)
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
19In the Contact process, sulphur dioxide reacts with air to form sulphur trioxide:
2SO2(g) + O2(g) 2SO3(g)
Which of the following statements are correct?
(1)The conversion is not 100% because the reaction is reversible.
(2)Sulphur dioxide and oxygen should be purified before reacting because impurities wouldpoison the catalyst in the reaction.
(3)Sulphur dioxide acts as an oxidizing agent.
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
20Which of the following statements about the Contact process are correct?
(1)Sulphur dioxide can be prepared by the direct oxidation of sulphur in air.
(2)The catalyst may be poisoned by impurities in sulphur dioxide and air.
(3)The optimum temperature and pressure for the formation of sulphur trioxide is 450 and 1 atmospheric pressure respectively.
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
23.4: Properties of concentrated sulphuric acid(CDC guide: Properties and reactions of concentrated sulphuric acid: (a) dehydrating property, (b) oxidizing property)
1What would be observed when concentrated sulphuric acid is added to hydrated copper(II)sulphate crystals?
AThe crystals dissolve to give a blue solution.
BThe crystals change from blue to white.
CThe crystals change from white to blue.
DThe crystals become a black solid.
2If a few drops of concentrated sulphuric acid have spilt on your hand, the first thing youshould do is to
Awash your hand with a large amount of water.
Bwash your hand with dilute sodium carbonate solution.
Creport it to your teacher.
Dwrap your hand with a wet cloth.
3When some drops of concentrated sulphuric acid have spilt on a school uniform, the stainedarea becomes blackened. It is because concentrated sulphuric acid acts as a / an
Astrong acid.
Boxidizing agent.
Cdehydrating agent.
Ddrying agent.
4In diluting concentrated sulphuric acid, we should
Aadd water slowly to the acid while stirring.
Badd water quickly to the acid while stirring.
Cadd the acid slowly to water while stirring.
Dadd the acid quickly to water while stirring.
5What changes can be observed in the following experimental set-up?
Universal indicator
Limewater
ATurns red
Remains unchanged
BRemains unchanged
Becomes cloudy
CTurns red
Becomes cloudy
DTurns yellow
Remains unchanged
6Which of the following phenomena does NOT show the dehydrating property of concentratedsulphuric acid?
ABlue hydrated copper(II) sulphate crystals turn white when concentrated sulphuric acid isadded.
BCloth turns brown and then holes appear when concentrated sulphuric acid is added.
CA brown gas is given off when silver is added to concentrated sulphuric acid.
DCane sugar turns black when concentrated sulphuric acid is added.
7Why it is NOT recommended to add water to concentrated sulphuric acid?
AConcentrated sulphuric acid reacts with water to produce toxic sulphur dioxide.
BThey are not miscible.
CThe reaction is highly exothermic and acid mist may form.
DConcentrated sulphuric acid is a drying agent.
8Which of the following statements concerning the reaction between sulphur and concentratedsulphuric acid is INCORRECT?
AWater is produced.
BSulphuric acid is reduced by sulphur.
CSulphur is oxidized and reduced at the same time.
DA pungent smell is detected.
9Consider the following experimental set-up used in the preparation of chlorine gas.
What is the function of concentrated sulphuric acid in the set-up?
ATo remove acidic impurities.
BTo oxidize the chlorine gas.
CTo convert hydrogen chloride to chlorine gas.
DTo dry the chlorine gas.
10Which of the following gases CANNOT be dried by concentrated sulphuric acid?
AAmmonia
BHydrogen
CNitrogen
DSulphur dioxide
11Which of the following combinations is correct?
Reaction
Observation
AConcentrated hydrochloric acid + copper
Gas bubbles are given off
BConcentrated sulphuric acid + zinc
Gas bubbles are given off
CConcentrated nitric acid + sodium oxide
Colourless gas is given off
DConcentrated sulphuric acid + sodium chloride No observable change
12Solution Y has a pH lower than 7. It reacts with silver to give a colourless solution. Solution Ymay be
Aconcentrated hydrochloric acid.
Bconcentrated ethanoic acid.
Cconcentrated carbonic acid.
D concentrated sulphuric acid.
13Charring occurs when concentrated sulphuric acid is spilt on a piece of wood. The reactioninvolved is
Adehydration.
Boxidation.
Creduction.
Dneutralization.
14Substance X gives identical product(s) when treated with dilute sulphuric acid or concentratedsulphuric acid. X may be
Asulphur.
Bcane sugar.
Czinc carbonate powder.
Dhydrated copper(II) sulphate crystals.
15Which of the following reactions can produce sulphur dioxide?
(1)Heating iron pyrite in air
(2)Heating sulphur in air
(3)Heating sodium sulphate in air
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
16The corrosive nature of concentrated sulphuric acid is due to its
(1)dehydrating property.
(2)high acidity.
(3)oxidizing property.
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
17Which of the following can be oxidized by hot concentrated sulphuric acid?
(1)Sulphur
(2)Carbon
(3)Copper
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
18Concentrated sulphuric acid is added to some hydrated copper(II) sulphate crystals. Which ofthe following statements concerning the process is / are correct?
(1)A chemical change occurs.
(2)The oxidizing property of concentrated sulphuric acid is responsible for the change thatoccurs.
(3)The crystals change to a black solid.
A(1) only
B(2) only
C(1) and (3) only
D(2) and (3) only
19What would be observed when copper is added to concentrated sulphuric acid?
(1)A brown fume is given off.
(2)The copper dissolves in the acid.
(3)A blue solution is obtained.
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
20Both concentrated and dilute sulphuric acid give the same products when they are added to
(1)sodium carbonate.
(2)zinc.
(3)sulphur.
A(1) only
B(2) only
C(1) and (3) only
D(2) and (3) only
21Which of the following statements about concentrated sulphuric acid are correct?
(1)There is no reaction between anhydrous copper(II) sulphate and concentrated sulphuricacid.
(2)When iron is added to concentrated sulphuric acid, the oxidation number of sulphurchanges from +6 to +4.
(3)When concentrated sulphuric acid is added to sugar, a black spongy mass would beobtained.
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)22When concentrated sulphuric acid is heated with silver, a gas is given off. The gas
(1)turns aqueous bromine colourless.
(2)turns iron(II) sulphate solution yellow.
(3)is acidic.
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
23When concentrated sulphuric acid is added to copper, it acts as
(1)a strong acid.
(2)an oxidizing agent.
(3)a dehydrating agent.
A(1) only
B(2) only
C(1) and (3) only
D(2) and (3) only
24Which of the following statements concerning the reaction of magnesium oxide andconcentrated sulphuric acid is / are correct?
(1)Sulphuric acid acts as an acid.
(2)Sulphuric acid acts as an oxidizing agent.
(3)Sulphuric acid acts as a dehydrating agent.
A(1) only
B(2) only
C(1) and (3) only
D(2) and (3) only
25A gas will be given off when concentrated sulphuric acid is added to
(1)sodium hydroxide.
(2)sodium hydrogencarbonate.
(3)zinc.
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
26When concentrated sulphuric acid is added to a piece of filter paper, the paper turns brown andthen black. It is because concentrated sulphuric acid acts as
(1)an oxidizing agent.
(2)a dehydrating agent.
(3)a dibasic acid.
A(1) only
B(2) only
C(1) and (3) only
D(2) and (3) only
27Which of the following statements concerning the reaction between concentrated sulphuric
acid and zinc is / are correct?
(1)The oxidation number of sulphur decreases by 4.
(2)An acidic gas is given off.
(3)Concentrated sulphuric acid acts as a dehydrating agent.
A(1) only
B(2) only
C(1) and (3) only
D(2) and (3) only
28Which of the following substances will be produced when concentrated sulphuric acid isadded to glucose (C6H12O6)?
(1)Water
(2)Carbon
(3)Sulphur dioxide
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
29Concentrated sulphuric acid acts as a dehydrating agent in its reaction with
(1)sodium hydroxide solution.
(2)a piece of wood.
(3)carbon.
A(1) only
B(2) only
C(1) and (3) only
D(2) and (3) only
30Concentrated sulphuric acid acts as an oxidizing agent in its reaction with
(1)iron.
(2)paper.
(3)sulphur.
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
31Which of the following pairs of substances can be distinguished using concentrated sulphuricacid?
(1)Carbon and copper(II) oxide
(2)Table salt and white sugar
(3)Potassium carbonate solid and potassium hydrogencarbonate solid
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
32Which of the following can be used to distinguish between concentrated hydrochloric acid andconcentrated sulphuric acid?
(1)Calcium nitrate solution
(2)Copper
(3)Sulphur
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
33Which of the following acids, when heated with copper, would produce a gas?
(1)Concentrated sulphuric acid
(2)Concentrated ethanoic acid
(3)Dilute nitric acid
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
34Which of the following substances can be used to distinguish between concentrated nitric acidand concentrated sulphuric occur?
(1)Hydrated copper(II) sulphate crystals
(2)Sodium carbonate powder
(3)Zinc
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
23.5: Properties of sulphur dioxide23.6: Test for sulphur dioxide23.7: Action of acids on sulphites23.8: Comparing the bleaching action of aqueous sulphur dioxide and hypochlorite ions(CDC guide: Properties and reactions of sulphur dioxide / sulphite: (a) bleachingaction, (b) action of acids on sulphite)
1Which of the following can be observed when sulphur dioxide is passed into aqueous bromine?
AAn orange solution is formed.
BAqueous bromine is decolourized.
CThe colour of aqueous bromine remains unchanged.
DOrange vapour is observed.
2Which of the following statements about sulphur dioxide is INCORRECT?
AThere are weak van der Waals forces between sulphur dioxide molecules.
BSulphur dioxide is a reducing agent.
CThere are strong covalent bonds between sulphur atoms and oxygen atoms.
DSulphur dioxide can decolourize dry blue litmus paper.
3Which of the following gases could be collected by the displacement of water?
ASulphur dioxide
BHydrogen chloride
CHydrogen
DChlorine
4Which of the following is NOT a property of sulphur dioxide?
AIts aqueous solution has a pH value smaller than 7.
BIt dissolves in water to give an acidic solution.
CIt turns moist blue litmus paper red.
DIt can be reduced to sulphate ions.
5In an experiment, sulphur dioxide is passed into an iodine solution which is prepared bydissolving some iodine in potassium iodide solution. Which of the following statementsconcerning this experiment is correct?
AA brown solid is formed.
BA displacement reaction occurs.
CSulphur dioxide is reduced in the reaction.
DThe colour of the iodine solution changes from brown to colourless.
6Sulphur dioxide is passed into a test tube containing iron(III) chloride solution. Which of thefollowing statements about this experiment is INCORRECT?
AThe oxidation number of sulphur changes from +4 to +6.
BThe iron(III) ions are reduced to iron(II) ions.
CThe resulting solution is neutral.
DThe solution changes from yellow to green.
7Which of the following statements about sulphur dioxide bleach is correct?
ASulphite ions are present in the bleach.
BIt can damage delicate materials such as silk.
CIts bleaching action is fast and vigorous.
DIts bleaching action is due to the reducing power of sulphate ions.
8Consider the following equation:
X + dye Y + (dye O)
coloured
colourless
X and Y are respectively
X
Y
ASO2(aq)
SO32-(aq)
BSO32-(aq)
SO42-(aq)
CCl2(aq)
HCl(aq)
DOCl-(aq)
Cl-(aq)
9Old newspaper often turns yellow because of
Athe decomposition of the bleached dye.
Bthe slow attack by bacteria.
Cthe oxidation of the reduced dye.
Dthe decomposition of the bleaching agent.
10Which of the following comparisons about chlorine bleach and aqueous sulphur dioxide iscorrect?
Chlorine bleach
Aqueous sulphur dioxide
ABleaching action is slower
Bleaching action is faster
BBleached by HOCl(aq)
Bleached by SO2(aq)
CBleaching effect ispermanent
Bleaching effect is temporary
DUsed to bleachdelicate material
Used to bleach cotton
11A colourless gas can turn a moist blue litmus paper red. The gas is probably
Aammonia.
Bnitrogen.
Coxygen.
Dsulphur dioxide.
12A mixture of three gases was passed through the set-up below. Only one gas was collected inthe gas jar.
Which of the following gases may present in the mixture?
AAmmonia, sulphur dioxide, hydrogen
BCarbon dioxide, sulphur dioxide, hydrogen chloride
CHydrogen, nitrogen, oxygen
DHelium, nitrogen, sulphur dioxide
13Which of the following CANNOT be decolourized by sodium sulphite solution?
AAcidified potassium permanganate solution
BAqueous bromine
CAcidified potassium dichromate solution
DIodine solution
14Which of the following statements about sulphur dioxide is INCORRECT?
ASulphur dioxide is denser than air.
BSulphur dioxide can turn dry blue litmus paper red.
CSulphite ions are produced when sulphur dioxide is dissolved in water.
DSulphur dioxide can react with sodium hydroxide solution.
15Which of the following statements about the bleaching action of sulphur dioxide isINCORRECT?
AIts bleaching action is mild.
BIts bleaching action is due to its reducing property.
CIts bleaching action is permanent.
DSulphur dioxide does not show its bleaching power in the absence of water.
16Which of the following sulphur-containing compounds has bleaching power?
ADilute sulphuric acid
BConcentrated sulphuric acid
CSodium sulphite solution
D Sodium sulphate solution
17Which of the following substances does NOT react with sodium sulphite solution?
AHydrochloric acid
BAcidified potassium dichromate solution
CPotassium bromide solution
DIodine dissolved in potassium iodide solution
18Which of the following statements about sulphur dioxide are correct?
(1)Sulphur dioxide can be produced by heating copper with concentrated sulphuric acid.
(2)Sulphur dioxide has a pungent smell.
(3)Sulphur dioxide can decolourize acidified potassium dichromate solution.
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
19Which of the following statements concerning sulphur dioxide are correct?
(1)It can be absorbed by sodium hydroxide solution.
(2)It is denser than air.
(3)Its aqueous solution can conduct electricity.
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
20Which of the following can decolourize acidified potassium permanganate solution?
(1)Magnesium sulphate solution
(2)Iron(II) sulphate solution
(3) Sodium sulphite solution
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
21When gas X is bubbled into solution Y, solution Y becomes cloudy. Which of the followingcombinations are correct?
X
Y
(1)SO2(g)
NaOH(aq)
(2)NH3(g)
Zn(NO3)2(aq)
(3)CO2(g)
Ca(OH)2(aq)
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
22Which of the following set-ups can be used to dry moist sulphur dioxide gas?
A(1) only
B(2) only
C(1) and (3) only
D(2) and (3) only
23Which of the following solutions can alter the colour of acidified potassium dichromatesolution?
(1)Potassium iodide solution
(2)Aqueous sulphur dioxide
(3)Iron(III) sulphate solution
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
24There will be a colour change when sulphur dioxide is bubbled into
(1)acidified potassium dichromate solution.
(2)acidified potassium permanganate solution.
(3)potassium bromide solution.
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
25Which of the following about sulphur dioxide bleach is / are correct?
(1)The bleaching action lasts for a long period of time.
(2)It is good for bleaching natural fibres.
(3)It bleaches by oxidizing the dyes.
A(1) only
B(2) only
C(1) and (3) only
D(2) and (3) only
26Which of the following gases can be collected by downward delivery?
(1)Carbon dioxide
(2)Sulphur dioxide
(3)Ammonia
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
27Which of the following gases can turn moist blue litmus paper red?
(1)Chlorine
(2)Sulphur dioxide
(3)Carbon dioxide
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
28When copper is added to concentrated sulphuric acid, a gas is given off. Which of thefollowing statements concerning the gas are correct?
(1)The gas is soluble in water.
(2)The gas has a pungent smell.
(3)The gas is toxic.
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
29When sodium sulphite powder is added to dilute hydrochloric acid, a gas is given off.Which of the following statements concerning the gas is / are correct?
(1)The gas can be collected by upward delivery.
(2)The gas is acidic.
(3)The gas is odourless.
A(1) only
B(2) only
C(1) and (3) only
D(2) and (3) only
30In which of the following reactions will sulphur dioxide be produced?
(1)Adding zinc to concentrated sulphuric acid
(2)Adding sodium sulphite to dilute sulphuric acid
(3)Adding sodium sulphate to acidified potassium permanganate solution
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
31Sulphur dioxide acts as a reducing agent when it is
(1)added to a coloured flower petal.
(2)added to iodine solution.
(3)converted to sulphur trioxide.
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
32In which of the following reactions does sulphur dioxide act as a reducing agent?
(1)2Mg(s) + SO2(g) 2MgO(s) + S(s)
(2)Cl2(g) + 2H2O(l) + SO2(g) H2SO4(aq) + 2HCl(aq)
(3)Ca(OH)2(aq) + SO2(g) CaSO3(s) + H2O(l)
A(1) only
B(2) only
C(1) and (3) only
D(2) and (3) only
33When sulphur dioxide is dissolved in water, the solution
(1)can conduct electricity.
(2)contains sulphur dioxide molecules.
(3)has bleaching power.
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
34Which of the following substances can be used to distinguish between sodium sulphitesolution and sodium sulphate solution?
(1)Aqueous bromine
(2)Dilute hydrochloric acid
(3)Barium chloride solution
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
23.9: Choosing a site for a chemical plant(CDC guide: Location of chemical plants in relation to the availability ofresources, transport and environmental impact)
1Hong Kong does NOT have its own plant for manufacturing sulphuric acid. Which of thefollowing is NOT a possible reason?
AHong Kong is an over-crowded city.
BThe local demand for sulphuric acid is not heavy.
CHong Kong does not have raw material for the manufacture.
DHong Kong does not have the advanced technique to run the plant.
2Which of the following factors should be considered when setting up an industrial plant for theproduction of chlorine?
(1)Environmental impacts
(2)Ease of availability of raw materials
(3)Ease of transportation
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
Unit 24
24.1: The relationship between gas volume and moles: Avogadros Law
24.2: Molar volume of a gas
24.3: Calculations from chemical equations24.4: Masses gas volumes calculations from chemical equations24.5: Gas volumes gas volumes calculations from chemical equations24.6: Concentration and volumes gas volumes calculations from chemical equations(CDC guide: Molar volume of gases at room temperature and pressure)
1Avogadros Law states that equal volume of all gases under the same temperature and pressurehave the same
Adensity.
Bmass.
Cnumber of atoms.
Dnumber of particles.
22 volumes of AB2 react with 1 volume of B2 to give 2 volumes of X. The formula of X is
AAB3.
BA2B3.
CA3B2.
DA3B4.
3What volume of oxygen, measured at room temperature and pressure, can be obtained when0.20 mole of sodium chlorate is completely decomposed by heat?
2NaClO3(s) 2NaCl(s) + 3O2(g)
(Molar volume of any gas at room temperature and pressure = 24.0 dm3 mol-1)
A2.4 dm3
B4.8 dm3
C7.2 dm3
D9.6 dm3450 cm3 of gas A2 react completely with 75 cm3 of oxygen to form 50 cm3 of a gaseous oxide.If all measurements are made at room temperature and pressure, the formula of the gaseousoxide is
AA2O.
BA2O3.
CA3O2.
DA3O4.
5200.0 cm3 of 5.00 M hydrochloric acid are added to 22.9 g of zinc. What is the volume ofgaseous product formed at room temperature and pressure?
(Relative atomic mass: Zn = 65.4; molar volume of any gas at room temperature and pressure= 24.0 dm3 mol-1)
A4 200 cm3
B8 400 cm3
C12 000 cm3
D24 000 cm36Which of the following contains the largest number of ATOMS at room temperature andpressure?
(Relative atomic mass: H = 1.0; molar volume of any gas at room temperature and pressure =24.0 dm3 mol-1)
A2 moles of ammonia gas
B3 moles of nitrogen gas
C7 g of hydrogen gas
D90 dm3 of hydrogen chloride gas
7What volume of 0.5 M sulphuric acid is required to react with excess solid sodiumhydrogencarbonate to produce 4.8 dm3 of carbon dioxide at room temperature and pressure?
(Molar volume of any gas at room temperature and pressure = 24.0 dm3 mol-1)
A0.2 dm3
B0.4 dm3
C2 dm3
D4 dm38Solid A undergoes complete thermal dissociation according to the following equation:
A(s) B(g) + C(s)
On heating 9.80 g of solid A, 2.80 dm3 of gas B and 4.60 g of solid C are obtained at roomtemperature and pressure. What is the molar mass of C?
(Molar volume of any gas at room temperature and pressure = 24.0 dm3 mol-1)
A32.0 g mol-1
B39.4 g mol-1
C44.6 g mol-1
D84.0 g mol-191.12 g of a gaseous hydrocarbon occupy 0.480 dm3 at room temperature and pressure. If thishydrocarbon has an empirical formula CH2, what is its molecular formula?
(Relative atomic masses: H = 1.0, C = 12.0; molar volume of any gas at room temperature andpressure = 24.0 dm3 mol-1)
AC2H4
BC3H6
CC4H8
DC5H1010Consider the following chemical equation:
Fe2O3(s) + 3CO(g) 2Fe(s) + 3CO2(g)
What volume of carbon dioxide, measured at room temperature and pressure, is produced if223 g of iron are formed?
(Relative atomic mass: Fe = 55.8; molar volume of any gas at room temperature and pressure= 24.0 dm3 mol-1)
A16 dm3
B36 dm3
C72 dm3
D 144 dm311In an experiment, 4.82 g of sulphur were burnt completely in air to form sulphur dioxide.What was the volume of sulphur dioxide formed, measured at room temperature and pressure?
(Relative atomic mass: S = 32.1; molar volume of any gas at room temperature and pressure =24.0 dm3 mol-1)
A1.8 dm3
B3.6 dm3
C7.2 dm3
D36.0 dm312One mole of each of the following substances is burnt in oxygen. Which substance requiresthe greatest volume of oxygen, measured at the same temperature and pressure, for completeburning?
ACarbon monoxide
BHydrogen
CSulphur
D Magnesium
13Ammonium dichromate (NH4)2Cr2O7 decomposes on heating to give chromium(III) oxide,water and nitrogen. What volume of nitrogen, measured at room temperature and pressure,
would be obtained when 63.0 g of ammonium dichromate undergo complete decomposition?(Relative atomic masses: H = 1.0, N = 14.0, O = 16.0, Cr = 52.0; molar volume of any gas atroom temperature and pressure = 24.0 dm3 mol-1)
A3.00 dm3
B6.00 dm3
C18.0 dm3
D24.0 dm314Decomposition of CrO3(s) gives Cr2O3(s) and O2(g) as the only products. What is the volumeof O2(g) produced, measured at room temperature and pressure, when 16.0 g of CrO3(s)undergo complete decomposition?
(Relative atmoic masses: O = 16.0, Cr = 52.0; molar volume of any gas at room temperatureand pressure = 24.0 dm3 mol-1)A1.92 dm3B2.88 dm3C3.84 dm3D5.12 dm315(NH4)2CO3 decomposes on heating to give NH3, CO2 and H2O. What is the volume of gaseousproduct at room temperature and pressure if 19.2 g of (NH4)2CO3 undergo completedecomposition?
(Relative atomic masses: H = 1.0, C = 12.0, N =14,0, O = 16.0; molar volume of any gas atroom temperature and pressure = 24.0 dm3 mol-1)
A4.80 dm3
B9.60 dm3
C14.4 dm3
D19.2 dm3
16Thermal decomposition of KClO3(s) gives KCl(s) and O2(g) as the only products. In anexperiment, 2 880 cm3 of O2(g) were obtained, measured at room termperature and pressure.What mass of KClO3(s) was decomposed?
(Relative atomic masses: O = 16.0, Cl = 35.5, K = 39.1; molar volume of any gas at roomtemperature and pressure = 24.0 dm3 mol-1)
A9.81 g
B12.3 g
C14.7 g
D22.1 g
17Under certain conditions, 120 cm3 of a gaseous compound, NxOy, decomposes completely togive 120 cm3 of nitrogen gas and 60 cm3 of oxygen gas.
(All gas volumes are measured under the same temperature and pressure.)
Which of the following combinations is correct?
x
y
A1
1
B1
2
C2
1
D2
3
18Which of the following gases occupies the largest volume at room temperature and pressure?
(Relative atomic masses: H = 1.0, N = 14.0, O = 16.0, S = 32.1)
A1.0 g of ammonia
B2.0 g of nitrogen monoxide
C3.0 g of nitrogen
D4.0 g of sulphur dioxide
19Which of the following gases has the same volume as 128.2 g of sulphur dioxide gas?(All volumes are measured at the same temperature and pressure.)
(Relative atomic masses: H = 1.0, He = 4.0, O = 16.0, Ne = 20.2, S = 32.1)
A2.0 g of hydrogen
B8.0 g of helium
C32.0 g of oxygen
D80.0 g of neon
2015.0 g of calcium carbonate is added to 100.0 cm3 of 2.00 M hydrochloric acid. What is thevolume of carbon dioxide liberated at room temperature and pressure?
(Relative atomic masses: C = 12.0, O = 16.0, Ca = 40.1; molar volume of any gas at roomtemperature and pressure = 24.0 dm3 mol-1)
A1 800 cm3
B2 400 cm3
C3 600 cm3
D4 800 cm321At room temperature and pressure, 21.0 g of nitrogen and 45.0 g of gas X occupy the samevolume. What is the molar mass of X?
(Relative atomic mass: N = 14.0)
A20.0 g mol-1
B40.0 g mol-1
C60.0 g mol-1
D80.0 g mol-122In an experiment, 109 g of zinc were treated with 500.0 cm3 of 5.0 M hydrochloric acid. Whatis the volume of hydrogen liberated at room temperature and pressure?
(Relative atomic mass: Zn = 65.4; molar volume of any gas at room temperature and pressure= 24.0 dm3 mol-1)
A20.0 dm3
B30.0 dm3
C40.0 dm3
D60.0 dm323Consider the reaction:
4H2(g) + Fe3O4(s) 3Fe(s) + 4H2O(l)
What mass of iron would be obtained if 48.0 dm3 of hydrogen, measured at room temperatureand pressure, are consumed in the reaction?
(Relative atomic mass: Fe = 55.8; molar volume of any gas at room temperature and pressure= 24.0 dm3 mol-1)
A55.8 g
B83.7 g
C167 g
D223 g
24Suppose that the Avogadro number is L. How many atoms does 300 cm3 of fluorine at roomtemperature and pressure contain?
(Molar volume of any gas at room temperature and pressure = 24.0 dm3 mol-1)
A
L
B
L
C25L
D50L
25Consider the following equation:
2SO2(g) + O2(g) 2SO3(g)
If 50 cm3 of sulphur dioxide react with 60 cm3 of oxygen, what would be the final volume ofthe gases?
(All volumes are measured at room temperature and pressure.)
A35 cm3
B50 cm3
C85 cm3
D100 cm326If a mixture of 32.0 g of oxygen and 16.0 g of hydrogen is exploded, what will be the volumeof the remaining gas at room temperature and pressure?
(Relative atomic masses: H = 1.0, O = 16.0; molar volume of any gas at room temperature andpressure = 24.0 dm3 mol-1)
A90 dm3
B144 dm3
C168 dm3
D190 dm327The equation for the complete combustion of propane is
C3H8(g) + 5O2(g) 3CO2(g) + 4H2O(l)
50 cm3 of propane are mixed into 500 cm3 of oxygen. The mixture is ignited. What is thevolume of the resultant gas mixture at room temperature and pressure?
(All volumes are measured under the same conditions.)
A150 cm3
B300 cm3
C400 cm3
D700 cm3
28Gases X and Y react to give a gaseous product Z. The reaction can be represented by theequation:
2X(g) + Y(g) 2Z(g)
In an experiment, 100 cm3 of X and 100 cm3 of Y are mixed and allowed to react in a closedvessel. What is the volume of the resultant gaseous mixture?
(All volumes are measured under the same conditions.)
A50 cm3
B100 cm3
C150 cm3
D200 cm3291.16 g of a metal oxide (X2O) decompose on heating to give metal X and 60.0 cm3 of oxygen,measured at room temperature and pressure. What is the relative atomic mass of X?
(Relative atomic mass: O = 16.0; molar volume of any gas at room temperature and pressure= 24.0 dm3 mol-1)
A29
B39
C108
D122
30Upon heating, 30.0 g of impure calcium carbonate give 6.48 dm3 of carbon dioxide at roomtemperature and pressure. What is the percentage purity of calcium carbonate in the sample?
(Relative atomic masses: C = 12.0, O = 16.0, Ca = 40.1; molar volume of any gas at roomtemperature and pressure = 24.0 dm3 mol-1)
A60.0%
B70.0%
C80.0%
D90.0%
31The formula of a solid dibasic acid is H2X. 4.05 g of the acid are dissolved in some distilledwater. Excess solid sodium carbonate is added to the acid solution. The reaction mixtureliberates 1 080 cm3 of carbon dioxide at room temperature and pressure. What is the molarmass of H2X?
(Molar volume of any gas at room temperature and pressure = 24.0 dm3 mol-1)
A11.3 g mol-1
B22.5 g mol-1
C45.0 g mol-1
D90.0 g mol-132What is the mass of 14.4 dm3 of sulphur dioxide, measured at room temperature and pressure?
(Relative atomic masses: O = 16.0, S = 32.1; molar volume of any gas at room temperatureand pressure = 24.0 dm3 mol-1)
A19.2 g
B25.6 g
C32.1 g
D38.5 g
33What is the volume of ammonia, measured at room temperature and pressure, required toneutralize 50.0 cm3 of 0.0500 M sulphuric acid?
(Molar volume of any gas at room temperature and pressure = 24.0 dm3 mol-1)
A60 cm3
B120 cm3
C180 cm3
D240 cm334In the electrolysis of dilute sulphuric acid using inert electrodes, 1.0 dm3 of hydrogen isproduced at the cathode. What is the volume of the gas produced at the anode under the sametemperature and pressure?
A0.5 dm3
B1.0 dm3
C1.5 dm3
D2.0 dm3
354 800 cm3 of carbon monoxide are burnt completely in oxygen to form carbon dioxide. Whatis the number of moles of oxygen required and carbon dioxide produced respectively?
(Molar volume of any gas at room temperature and pressure = 24.0 dm3 mol-1)
Number of
Number of moles
moles of oxygenof carbon dioxide
A
0.2
0.2
B
0.1
0.2
C
0.2
0.1
D
0.1
0.1
36The volume occupied by a certain gas depends on
(1)the number of gas molecules present.
(2)temperature.
(3)pressure.
(4)the size of gas molecules.
A(2) and (4) only
B(1), (2) and (3) only
C(1), (3) and (4) only
D(1), (2), (3) and (4)
37Which of the following gases contain the same number of molecules as 150 cm3 of oxygenunder the same temperature and pressure?
(1)75 cm3 of NH3
(2)100 cm3 of O3
(3)150 cm3 of Ne
(4)150 cm3 of CO2
A(1) and (2) only
B(3) and (4) only
C(1), (3) and (4) only
D(2), (3) and (4) only
38At room temperature and pressure, a sample of oxygen gas occupies 24.0 dm3. Which of thefollowing statements concerning this sample of oxygen gas is / are correct?
(1)It has a mass of 16.0 g.
(2)It contains 6.02 ( 1023 oxygen molecules.
(3)It can form 1 mole of O2- ions.
(Relative atomic mass: O = 16.0; molar volume of any gas at rooom temperature and pressure= 24.0 dm3 mol-1; Avogodro constant = 6.02 ( 1023 mol-1)
A(1) only
B(2) only
C(1) and (3) only
D(2) and (3) only
39Which of the following statements concerning one mole of chlorine gas is / arecorrect?
(1)It has a mass of 35.5 g.
(2)It occupies the same volume as 20.2 g of neon gas at room temperature and pressure.
(3)It contains 6.02 ( 1023 chlorine atoms.
(Relative atomic masses: Ne = 20.2, Cl = 35.5; Avogadro constant L = 6.02 ( 1023 mol-1)
A(1) only
B(2) only
C(1) and (3) only
D(2) and (3) only
40The mass of one mole of silicon atoms is twice that of one mole of nitrogen atoms. Which ofthe following statements is / are correct?
(1)2 g of silicon and 1 g of nitrogen each occupy the same volume at room temperature andpressure.
(2)2 g of silicon and 1 g of nitrogen each contain the same number of atoms.
(3)one mole of silicon and one mole of nitrogen occupy the same volume at roomtemperature and pressure.
A(1) only
B(2) only
C(1) and (3) only
D(2) and (3) only
41Consider the information about the reaction of hydrogen with nitrogen below:
N2(g) + 3H2(g) 2NH3(g)
(H < 0
Which of the following statements can be deduced from the above information?
(1)Heat is liberated when ammonia is formed.
(2)Nitrogen and hydrogen react at high temperature.
(3)When measured at room temperature and pressure, the total gas volume before thereaction equals to that after the reaction.
A(1) only
B(2) only
C(1) and (3) only
D(2) and (3) only
42Consider the following reaction.
CH3CH2OH(aq) + 3O2(g) 2CO2(g) + 3H2O(l)
Which of the following statements concerning the reaction are correct?
(1)1 mole of ethanol requires 3 moles of oxygen for complete reaction.
(2)It is a redox reaction.
(3)When 30 cm3 of oxygen react with excess ethanol, 20 cm3 of carbon dioxide and 30 cm3of water are produced, measured at room temperature and pressure.
A(1) and (2) only
B(1) and (3) only
C(2) and (3) only
D(1), (2) and (3)
_1217946026.unknown
_1217946047.unknown