Section 7 / Sect7pp.doc / S. W. Tse / P.1
85 Q.10
If a mixture of 0.80g of oxygen and 0.20g of hydrogen is exploded, what will be the volume of
the remaining gas at room temperature and pressure?
(Relative atomic masses: H = 1.0, O = 16;
Molar volume of a gas at room temperature and pressure = 24 dm3)
A.
C.
0.60 dm3
1.2 dm3
B.
D.
0.90 dm3
2.4 dm3
85 Q.11
When 4.6 g of ethanol are completely burnt in air, what is the volume of carbon dioxide
produced at room temperature and pressure?
(Relative atomic masses: H = 1.0, C = 12; O = 16;
Molar volume of a gas at room temperature and pressure = 24 dm3)
A.
C.
1.2 dm3
3.6 dm3
B.
D.
2.4 dm3
4.8 dm3
85 Q.43
In the manufacture of sulphuric acid by the Contact Process, which of the following steps
require the use of a catalyst?
(1) the burning of sulphur to form sulphur dioxide
(2) the oxidation of sulphur dioxide to sulphur trioxide
(3) the conversion of sulphur trioxide to sulphuric acid
A.
C.
(2) only
(1) and (2) only
B.
D.
(3) only
(2) and (3) only
86 Q.16
When ammonium chloride is warmed with concentrated sulphuric acid in a test-tube, a gas is
evolved which will
A.
B.
C.
D.
bleach moist litmus paper.
condense to form a white solid at the mouth of the test-tube.
turn acidified potassium dichromate(VI) solution green.
form white fumes with ammonia.
Section 7 / Sect7pp.doc / S. W. Tse / P.2
86 Q.22
Which of the following set-ups should be used to dry ammonia gas?
A.
B.
ammonia
ammonia
conc.
H2SO4
C.
anhydrous
CaCl2
D.
ammonia
ammonia
conc.
H2SO4
anhydrous
CaO
87 Q.5
What volume of oxygen, measured at room temperature and pressure, is obtained when 0.1
mole of potassium nitrate is completely decomposed by heat?
(Molar volume of a gas at room temperature and pressure = 24 dm3)
A.
C.
0.6 dm3
2.4 dm3
B.
D.
1.2 dm3
4.8 dm3
87 Q.6
Assuming that the effectiveness of a nitrogen-containing fertilizer is proportional to its
nitrogen content, which of the following compounds would be most effective as a fertilizer?
A.
B.
C.
D.
Relative molecular mass
60
80
101
132
CO(NH2)2
NH4NO3
KNO3
(NH4)2SO4
87 Q.34
The bleaching action of sulphur dioxide is
permanent.
1st statement
A.
True
B.
True
C.
True/False
D.
False
2nd statement
True
True
False/True
False
Sulphur dioxide bleaches by reduction.
2nd statement is a correct explanation of the 1st one.
2nd statement is NOT a correct explanation of the 1st one.
Only ONE of the statements is true, the other is false.
-----
Section 7 / Sect7pp.doc / S. W. Tse / P.3
88 Q.4
1.4g of ethene are completely burnt in excess oxygen. What is the volume of carbon dioxide
obtained at room temperature and pressure?
(Molar volume of a gas at room temperature and pressure = 24 dm3;
Relative atomic masses: H = 1, C = 12, O = 16)
A.
C.
0.6 dm3
2.4 dm3
B.
D.
1.2 dm3
4.8 dm3
88 Q.16
NaX is a colourless solid which is soluble in water. An aqueous solution of NaX gives a white
precipitate with lead(II) ethanoate solution. On heating NaX with concentrated sulphuric acid,
a reddish brown gas is evolved. X - is likely to be
A.
C.
Cl I-
B.
D.
Br NO3-
88 Q.37
Which of the following elements show more than one oxidation state in their compounds?
(1) nitrogen
(2) chlorine
(3) aluminium
A.
C.
(1) and (2) only
(2) and (3) only
B.
D.
(1) and (3) only
(1), (2) and (3)
89 Q.4
100 cm3 of gas X2 react completely with 150 cm3 of oxygen to form 100 cm3 of a gaseous
oxide. If all measurements are made at room temperature and pressure, the formula of the
gaseous oxide is
A.
C.
XO2.
X2O3.
B.
D.
X2O.
X3O2.
89 Q.6
When 250 cm3 of 2.00 M hydrochloric acid are added to 13.0 g of zinc, the volume of gas
produced at room temperature and pressure is
A.
C.
2.40 dm3.
6.00 dm3.
B.
D.
4.80 dm3.
12.00 dm3.
89 Q.15
Chlorine gas
A.
B.
C.
D.
decolorizes bromine water.
liberates iodine from potassium iodide solution.
turns acidified potassium dichromate solution from orange to green.
turns iron (III) chloride solution from yellow to green.
Section 7 / Sect7pp.doc / S. W. Tse / P.4
89 Q.16
Chlorine reacts with cold dilute aqueous sodium hydroxide according to the equation:
Cl2(g) + 2NaOH(aq) → NaClO(aq) + NaCl(aq) + H2O(l)
Which of the following statements concerning this reaction is correct?
A.
B.
C.
D.
Chlorine is oxidized and sodium hydroxide is reduced.
Chlorine is reduced and sodium hydroxide is oxidized.
Chlorine is both oxidized and reduced.
Sodium hydroxide is both oxidized and reduced.
89 Q.17
Hydrochloric acid is prepared in the laboratory by bubbling hydrogen chloride gas into water
using an inverted funnel as shown below:
hydrogen chloride gas
water
The main purpose of using an inverted funnel is to
A.
B.
C.
D.
obtain a more concentrated solution.
increase the rate at which the gas dissolves in water.
increase the solubility of the gas in water.
prevent sucking back of water.
89 Q.18
A colourless gas X is soluble in water and turns moist blue litmus paper red. X can also
decolorize bromine water. X is probably
A.
B.
C.
D.
ethene.
sulphur dioxide.
carbon dioxide.
hydrogen chloride.
89 Q.19
In the Contact Process, the sulphur trioxide produced is converted to sulphuric acid by
A.
B.
C.
D.
dissolving directly in water.
dissolving in dilute sulphuric acid.
dissolving in concentrated sulphuric acid and then diluting with water.
dissolving in oleum and then diluting with water.
Section 7 / Sect7pp.doc / S. W. Tse / P.5
89 Q.42
Solid ammonium chloride is heated gently in a test-tube as shown in the diagram below:
moistened neutral litmus
paper
solid
ammonium
chloride
heat
Which of the following descriptions is / are correct?
(1) The litmus paper first turns red and then blue.
(2) The litmus paper first turns blue and then red.
(3) Solid ammonium chloride undergoes thermal decomposition.
A.
C.
(1) only
(1) and (3) only
B.
D.
(2) only
(2) and (3) only
90 Q.8
Which of the following contains the largest number of ATOMS at room temperature and
pressure?
(Relative atomic masses: H = 1.0; N = 14.0; Cl = 35.5;
Molar volume of gas at room temperature and pressure = 24 dm3)
A.
B.
C.
D.
2 mol of ammonia gas
3 mol of nitrogen gas
7g of hydrogen gas
90 dm3 of hydrogen chloride gas
90 Q.11
What volume of 0.5M sulphuric acid is required to liberate 4.8 dm3 of carbon dioxide at room
temperature and pressure from excess solid sodium hydrogencarbonate?
(Molar volume of gas at room temperature and pressure = 24 dm3)
A.
C.
0.2 dm3
2.0 dm3
B.
D.
0.4 dm3
4.0 dm3
Section 7 / Sect7pp.doc / S. W. Tse / P.6
90 Q.29
After a thunderstorm, rainwater is often found to contain nitric acid. Which of the following
reactions occurs during a lightning flash to bring about the subsequent formation of nitric acid?
A.
B.
C.
D.
Nitrogen reacts with oxygen.
Nitrogen monoxide reacts with oxygen.
Nitrogen monoxide reacts with rainwater.
Nitrogen dioxide reacts with rainwater.
90 Q.47
The bleaching action of sulphur dioxide is
not permanent.
1st statement
A.
True
B.
True
C.
True/False
D.
False
2nd statement
True
True
False/True
False
Sulphur dioxide reacts with water to form a
weak acid.
2nd statement is a correct explanation of the 1st one.
2nd statement is NOT a correct explanation of the 1st one.
Only ONE of the statements is true, the other is false.
-----
91 Q.3
Solid X undergoes complete thermal dissociation according to the following equation:
X(s) → Y(g) + Z(s)
On heating 4.90g of solid X, 1.40 dm3 of gas Y and 2.30g of solid Z are obtained at room
temperature and pressure. What is the relative molecular mass of Y?
(Molar volume of gas at room temperature and pressure = 24.0 dm3)
A.
C.
32.0
44.6
B.
D.
39.4
84.0
91 Q.19
Two volumes of ammonia react with one volume of oxygen over white-hot platinum. Which of
the following combinations for this reaction is correct?
A.
B.
C.
D.
Products
NO and H2O
NO and H2O
NO2 and H2O
NO2 and H2O
∆H
negative
positive
negative
positive
91 Q.21
Iron (II) sulphate solution is mixed with chlorine water. Excess aqueous ammonia is then
added to the mixture. What is the colour of the precipitate formed?
A.
C.
white
green
B.
D.
yellow
brown
Section 7 / Sect7pp.doc / S. W. Tse / P.7
91 Q.31
Which of the following substances, when heated, can react with oxygen?
(1) sodium
(2) sulphur
(3) iron
A.
C.
(2) only
(1) and (3) only
B.
D.
(1) and (2) only
(1), (2) and (3)
91 Q.32
Which of the following gases contain the same number of molecules as 300 cm3 of oxygen
under the same temperature and pressure?
(1) 150 cm3 of NH3
(2) 200 cm3 of O3
(3) 300 cm3 of He
(4) 300 cm3 of HCl
A.
C.
(1) and (2) only
(1), (3) and (4) only
B.
D.
(3) and (4) only
(2), (3) and (4) only
91 Q.37
Which of the following oxidation numbers can nitrogen display in its compound?
(1) -3
(2) +2
(3) +3
(4) +4
A.
C.
(1) and (4) only
(1), (2) and (4) only
B.
D.
(2) and (3) only
(1), (2), (3) and (4)
91 Q.41
Which of the following methods can be used to produce ammonia?
(1) heating ammonium carbonate
(2) heating a mixture of ammonium sulphate and calcium oxide
(3) mixing 1 volume of nitrogen and 3 volumes of hydrogen at room temperature and
pressure
A.
C.
(1) and (2) only
(2) and (3) only
B.
D.
(1) and (3) only
(1), (2) and (3)
91 Q.45
Which of the following statements about hydrogen chloride is / are correct?
(1) It forms dense white fumes with ammonia gas.
(2) It dissolves in methylbenzene to form H+ and Cl- ions.
(3) It turns dry litmus paper red.
A.
C.
(1) only
(1) and (3) only
B.
D.
(2) only
(2) and (3) only
Section 7 / Sect7pp.doc / S. W. Tse / P.8
92 Q.6
0.01 mol of C2H5OH is burnt completely in oxygen. What are the numbers of moles of carbon
dioxide and water formed respectively?
A.
B.
C.
D.
carbon dioxide
0.01
0.02
0.02
0.04
water
0.03
0.03
0.06
0.06
92 Q.8
The manufacture of sulphuric acid can be represented by the following flow diagram:
Stage I
S
Stage II
SO2
Stage IV
Stage III
SO3
H2S2O7
H2SO4
Which stage involves the greatest change in the oxidation number of sulphur?
A.
C.
Stage I
Stage III
B.
D.
Stage II
Stage IV
92 Q.13
When 2 moles of oxygen gas are collected at the anode during the electrolysis of dilute
sulphuric acid, the number of moles of electrons released at the anode is
A. 2.
B.
4.
C. 6.
D.
8.
92 Q.16
When sulphur dioxide is bubbled into sodium hydroxide solution for a long time, the final
product is
A. sodium sulphite.
B. sodium sulphate.
C. sodium hydrogensulphite.
D. sodium hydrogensulphate.
92 Q.32
Which of the following products are formed when nitrogen dioxide reacts with sodium
hydroxide solution?
(1) sodium nitrite
(2) sodium nitrate
(3) nitrogen monoxide
A. (1) and (2) only
B.
(1) and (3) only
C. (2) and (3) only
D.
(1), (2) and (3)
Section 7 / Sect7pp.doc / S. W. Tse / P.9
93 Q.9
0.21 g of a gaseous hydrocarbon occupies 0.12 dm3 at room temperature and pressure. If this
hydrocarbon has the empirical formula CH2, what is its molecular formula?
(Relative atomic masses: H = 1.0, C = 12.0;
Molar volume of gas at room temperature and pressure = 24.0 dm3)
A. C2H4
B.
C3H6
C. C4H8
D
C5H10
93 Q.25
Which of the following properties apply to sulphur dioxide?
(1) It bleaches dry litmus paper.
(2) It decolorizes bromine water.
(3) It supports the burning of magnesium ribbon.
A. (1) and (2) only
B.
(1) and (3) only
C. (2) and (3) only
D.
(1), (2) and (3)
93 Q.27
Which of the following solutions forms a precipitate with excess aqueous ammonia?
A. copper (II) chloride solution
B. aluminium nitrate solution
C. zinc sulphate solution
D. sodium chloride solution
93 Q.28
copper (II) oxide
dry ammonia
gaseous
products
heat
In the above experiment, the gaseous products are
A. nitrogen and water vapour.
B. nitrogen and hydrogen.
C. nitrogen monoxide and water vapour.
D. nitrogen monoxide and hydrogen.
93 Q.44
Which of the following statements is INCORRECT?
A.
B.
C.
D.
Tin is used for making food cans.
Sulphuric acid is used for making soap.
Ammonium chloride is used for making dry cells.
Chlorine is used for sterilizing drinking water.
93 Q.47
A flash of lighting causes nitrogen
monoxide to be formed in the air.
Lighting provides sufficient energy for
nitrogen to react with oxygen in the air.
Section 7 / Sect7pp.doc / S. W. Tse / P.10
1st statement
A.
True
B.
True
C.
True/False
D.
False
2nd statement
True
True
False/True
False
2nd statement is a correct explanation of the 1st one.
2nd statement is NOT a correct explanation of the 1st one.
Only ONE of the statements is true, the other is false.
-----
94 Q.14
Some chlorine water was exposed to sunlight (Diagram A); a gas X was collected after some
time (Diagram B).
sunlight
gas X
chlorine
water
Diagram A
Diagram B
Which of the following statements concerning gas X is correct?
A.
B.
C.
D.
It can relight a glowing splint.
It has a pungent smell.
It can turn wet blue litmus paper red and then white.
It can give a “POP” sound with a burning splint.
94 Q.21
A solution of chlorine in tetrachloromethane is shaken with an aqueous solution of a compound
X in a test tube. On standing, two layers are formed in the test tube and the lower layer is violet
in colour. X may be
A.
B.
C.
D.
sodium fluoride.
sodium bromide.
sodium iodide.
sodium sulphite.
Section 7 / Sect7pp.doc / S. W. Tse / P.11
94 Q.39
Oxygen is bubbled slowly into a concentrated ammonia solution as shown in the diagram
below.
oxygen
glass rod
red hot platinum wire
concentrated ammonia solution
Which of the following statements concerning the experiment are correct?
(1) A brown gas is formed in the flask.
(2) The platinum wire remains red hot throughout the experiment.
(3) A chemical reaction occurs at the surface of the platinum wire.
A.
C.
(1) and (2) only
(2) and (3) only
B.
D.
94 Q.47
At room temperature and pressure, the
molar volume of oxygen gas is greater than
that of hydrogen gas.
1st statement
A.
True
B.
True
C.
True/False
D.
False
2nd statement
True
True
False/True
False
(1) and (3) only
(1), (2) and (3)
The relative atomic mass of oxygen is
greater than that of hydrogen.
2nd statement is a correct explanation of the 1st one.
2nd statement is NOT a correct explanation of the 1st one.
Only ONE of the statements is true, the other is false.
-----
95 Q.6
Which of the following fertilizers contains the largest percentage by mass of nitrogen?
(Relative atomic masses: H = 1.0; N = 14.0; O = 16.0; Na = 23.0; S = 32.0; Cl = 35.5; K =
39.0)
A.
B.
C.
D.
ammonium chloride
ammonium sulphate
potassium nitrate
sodium nitrate
Section 7 / Sect7pp.doc / S. W. Tse / P.12
95 Q.17
Compound X is a white solid. When X is warmed with sodium hydroxide solution, a gas is
evolved which turns moist red litmus paper blue. When chlorine water is added to an aqueous
solution of X, a brown solution is formed. X is probably
A.
C.
ammonium bromide.
sodium bromide.
B.
D.
ammonium chloride.
sodium chloride.
95 Q.19
Which of the following is a common use of ammonium nitrate?
A.
B.
C.
D.
to cure plant diseases
to retard the growth of weeds
to increase crop yield
to neutralize acidic soil
95 Q.28
In the Haber process, the following reaction occurs:
N2(g) + 3H2(g)
∆H = -92 kJ mol-1
2NH3(g)
Which of the following statements concerning this reaction is correct?
A.
B.
C.
D.
The forward reaction is endothermic.
The forward reaction can go completion if sufficient amounts of nitrogen and hydrogen are
used.
In the catalytic conversion chamber, nitrogen, hydrogen and ammonia are all present.
The optimum conditions for the Haber process are 10 atm and 500 oC.
95 Q.31
(Refer to 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 if
224 g of iron are formed?
(Relative atomic mass: Fe = 56;
Molar volume of gas at room temperature and pressure = 24 dm3)
A.
C.
16 dm3
72 dm3
B.
D.
36 dm3
144 dm3
95 Q.38
Which of the following statements concerning the contact process is / are correct?
(1) The sulphur dioxide used in the process can be produced by roasting sulphide ores.
(2) A gaseous mixture of sulphur dioxide and oxygen in the mole ratio of 1:2 is passed into
the catalytic conversion chamber.
(3) The sulphur trioxide produced is absorbed by water in the absorption tower.
A. (1) only
B.
(2) only
C. (1) and (3) only
D.
(2) and (3) only
Section 7 / Sect7pp.doc / S. W. Tse / P.13
96 Q.11
In an experiment, 1.6g of sulphur ore burnt completely in air to form sulphur dioxide. What
volume of sulphur dioxide, measured at room temperature and pressure, is formed?
(Relative atomic mass: S = 32.0;
Molar volume of gas at room temperature and pressure = 24.0 dm3)
A.
C.
0.6 dm3
2.4 dm3
B.
D.
1.2 dm3
12.0 dm3
96 Q.15
Which of the following substances, when mixed, will undergo a reaction?
A.
C.
vinegar and anti-acid
vinegar and table salt
B.
D.
bleach and anti-acid
bleach and table salt
96 Q.17
A gardener bought a bag of potassium nitrate and a bag of ammonium sulphate, to be used as
fertilizers. He forgot to label the bags. Which of the following tests would enable him to
distinguish between the two chemicals?
A.
B.
C.
D.
heating each chemical with dilute sulphuric acid
heating each chemical with sodium chloride solution
heating each chemical with potassium hydroxide solution
heating each chemical with acidified potassium dichromate solution
96 Q.19
Under certain conditions, 60 cm3 of a gaseous compound, NxOy decomposed completely to
give 60 cm3 of nitrogen gas and 30 cm3 of oxygen gas. (all gas volumes are measured at the
same temperature and pressure.)
Which of the following combinations is correct?
A.
B.
C.
D.
x
1
1
2
2
y
1
2
1
3
96 Q.21
Which of the following statements concerning chlorine is INCORRECT?
A.
B.
C.
D.
It can kill germs.
It can turn bromine water colourless.
It can oxidize iodide ions to iodine molecules.
It can be produced by the reaction between dilute sulphuric acid and sodium hydrochlorite
solution.
Section 7 / Sect7pp.doc / S. W. Tse / P.14
96 Q.32
Which of the following statements concerning one mole of nitrogen gas is / are correct?
(1) It has a mass of 14.0g.
(2) It occupies the same volume as 4.0g of helium gas at room temperature and pressure.
(3) It contains 6.02 x 1023 atoms of nitrogen.
(Relative atomic masses: He = 4.0; N = 14.0; Avogadro constant = 6.02 x 1023 mol-1)
A.
C.
(1) only
(1) and (3) only
B.
D.
(2) only
(2) and (3) only
96 Q.37
In which of the following reactions does sulphur dioxide acts as a reducing agent?
(1) the production of sulphuric acid in the contact process
(2) the bleaching of a red petal
(3) the decolorization of bromine water
A.
C.
(1) and (2)only
(2) and (3) only
B.
D.
(1) and (3) only
(1), (2) and (3)
97 Q.17
Which of the following gases occupies the largest volume at room temperature and pressure?
(Relative atomic masses: H = 1.0; C = 12.0; N = 14.0; O = 16.0;
Molar volume of gas at room temperature and pressure = 24.0 dm3)
A. 1.0g of ammonia
B.
2.0g of nitrogen
C. 3.0g of oxygen
D.
4.0g of carbon dioxide
97 Q.21
The following equation represents the reaction of chlorine with dilute sodium hydroxide
solution at room temperature:
Cl2(g) + 2NaOH(aq) → NaCl(aq) + NaClO(aq) + H2O(l)
Which of the following statements concerning this reaction is correct?
A.
B.
C.
D.
Chlorine is oxidized and sodium hydroxide is reduced.
Chlorine is reduced and sodium hydroxide reduced.
Chlorine is simultaneously oxidized and reduced.
Sodium hydroxide is simultaneously oxidized and reduced.
97 Q.25
Which of the following statements concerning the Haber Process is INCORRECT?
A.
B.
C.
D.
Iron is used as a catalyst in the process.
The reaction involved in the process is reversible.
The reaction involved in the process is exothermic.
The process is performed at one atmosphere pressure.
Section 7 / Sect7pp.doc / S. W. Tse / P.15
97 Q.34
One mole of sulphur atoms has a mass twice that of one mole of oxygen atoms. Which of the
following statements is / are correct?
(1) 2 g of sulphur and 1 g of oxygen each occupy the same volume at room temperature and
pressure.
(2) 2 g of sulphur and 1 g of oxygen each contain the same number of atoms.
(3) The number of atoms contained in one mole of sulphur is twice that contained in one
mole of oxygen.
A.
C.
(1) only
(1) and (3) only
B.
D.
(2) only
(2) and (3) only
97 Q.43
Which of the following elements are essential for plant growth?
(1) potassium
(2) phosphorus
(3) silicon
(4) nitrogen
A. (1), (2) and (3) only
B.
(1), (2) and (4) only
C. (1), (3) and (4) only
D.
(2), (3) and (4) only
97 Q.44
Which of the following substances are used to produce nitric acid in industry?
(1) air
(2) water
(3) nitrogen
(4) ammonia
A. (1), (2) and (3) only
B.
(1), (2) and (4) only
C. (1), (3) and (4) only
D.
(2), (3) and (4) only
97 Q.45
Newspapers gradually turn yellow in air.
1st statement
A.
True
B.
True
C.
True/False
D.
False
2nd statement
True
True
False/True
False
Sulphur-containing pollutants are present in
air.
2nd statement is a correct explanation of the 1st one.
2nd statement is NOT a correct explanation of the 1st one.
Only ONE of the statements is true, the other is false.
-----
98 Q.10
The formula for hydrated iron(II) sulphate is FeSO4⋅xH2O. On strong heating, 20.1 g of the
sulphate produces 9.1 g of water. What is the value of x?
(Relative atomic masses : H = 1.0, O = 16.0, S = 32.1, Fe = 56.0)
A.
C.
5
7
B.
D.
6
8
Section 7 / Sect7pp.doc / S. W. Tse / P.16
98 Q.12
A gas X is bubbled into a solution of Y as shown in the above diagram. In which of the
following combinations would X react with Y?
A.
B.
C.
D.
X
ammonia
chlorine
Carbon dioxide
sulphur dioxide
Y
potassium iodide
potassium nitrate
sodium hydroxide
iron(II) sulphate
98 Q.20
The following equation represents the reaction of an oxide of lead with hydrogen:
What mass of lead would be obtained if 68.5 g of the oxide was consumed in the reaction?
(Relative atomic masses : 0 = 16.0, Pb = 207.0)
A.
C.
20.7 g
62.1 g
B.
D.
41.4 g
82.8 g
98 Q.28
7.5 g of calcium carbonate is added to 50.0 cm3 of 2 M hydrochloric acid.
What is the volume of carbon dioxide liberated at room temperature and pressure?
(Relative atomic masses : C = 12.0, 0 = 16.0, Ca = 40.0;
molar volume of gas at room temperature and pressure = 24.0 dm3)
A.
C.
0.9 dm3
1.8 dm3
B.
D.
1.2 dm3
2.4 dm3
98 Q.30
Which of the following steps is NOT included in the Contact Process for the manufacturing of
sulphuric acid?
A.
B.
C.
D.
burning sulphur in air to form sulphur dioxide
oxidizing sulphur dioxide to form sulphur trioxide
dissolving sulphur trioxide in water to form oleum
mixing oleum with water to form concentrated sulphuric acid
Section 7 / Sect7pp.doc / S. W. Tse / P.17
98 Q.32
Which of the following combinations is correct?
A.
B.
C.
D.
Sulphur dioxide bleach
The active ingredient is SO42- (aq)
It bleaches by oxidation.
Its bleaching action is faster.
Its bleaching effect is temporary.
Chlorine bleach
The active ingredient is OCl-(aq).
It bleaches by reduction.
Its bleaching action is slower.
Its bleaching effect is relatively long-lasting.
98 Q.34
Which of the following substances is/are the main product(s) when a mixture of ammonia and
oxygen is passed over red-hot platinum?
(1) nitrogen
(2) nitrogen monoxide
(3) nitric acid
A.
C.
(1) only
(1) and (3) only
B.
D.
(2) only
(2) and (3) only
98 Q.37
The following information is related to the manufacture of ammonia:
Which of the following statements can be deduced from the above information?
(1) Heat is liberated when ammonia is formed.
(2) Ammonia decomposes to give nitrogen and hydrogen in the reaction chamber.
(3) A catalyst should be used.
A.
C.
(1) and (2) only
(2) and (3) only
B.
D.
(1) and (3) only
(1), (2) and (3)
98 Q.38
Which of the following experiments would produce sulphur dioxide?
(1)
(2)
(3)
A.
C.
heating iron pyrites in air
heating a mixture of iron and dilute sulphuric acid
heating a mixture of copper and concentrated sulphuric acid
(1) and (2) only
(2) and (3) only
B.
D.
(1) and (3) only
(1), (2) and (3)
Section 7 / Sect7pp.doc / S. W. Tse / P.18
98 Q.42
Which of the following statements concerning the gas produced in the above
experiment are correct?
(1) It is toxic.
(2) It is readily soluble in 1,1,1 -trichloroethane.
(3) It can turn red litmus solution blue and then colourless.
A.
C.
(1) and (2) only
(2) and (3) only
B.
D.
98 Q.46
One mole of water occupies the same
volume as one mole of carbon dioxide at
room temperature and pressure.
1st statement
A.
True
B.
True
C.
True/False
D.
False
2nd statement
True
True
False/True
False
(1) and (3) only
(1), (2) and (3)
One mole of water contains the same
number of atoms as one mole of carbon
dioxide.
2nd statement is a correct explanation of the 1st one.
2nd statement is NOT a correct explanation of the 1st one.
Only ONE of the statements is true, the other is false.
-----
99 Q.7
Substance X gives identical product(s) when treated with dilute sulphuric acid of concentrated
sulphuric acid, X may be
A.
C.
zinc.
ammonia.
B.
D.
cane sugar.
hydrated copper (II) sulphate crystals.
Section 7 / Sect7pp.doc / S. W. Tse / P.19
99 Q.9
In which of the following reactions is the underlined reactant reduced?
A.
B.
C.
D.
Cu2+
SO2
2NH3
Zn +
+ 2OH−
+ 2Mg
+ 3CuO
2AgNO3
→
→
→
→
Cu(OH)2
2MgO + S
3Cu + N2 + 3H2O
Zn(NO3) 2 + 2Ag
99 Q.15
Potassium permanganate solution acidified with dilute sulphuric acid is a commonly-used
oxidizing agent. Dilute nitric acid is not used to acidify potassium permanganate solution
because
A.
B.
C.
D.
nitric acid is more expensive than sulphuric acid.
dilute nitric acid is an oxidizing agent and would react with the reducing agent.
nitric acid decomposes more readily than sulphuric acid.
dilute nitric acid would react with potassium permanganate solution.
99 Q.16
At room temperature and pressure, 8.0 g of oxygen and 20.0 g of gas X occupy the same
volume. What is the molar mass of X?
(Relative atomic mass: 0 = 16.0;
molar volume of gas at room temperature and pressure = 24.0 dm3)
A.
C.
20.0 g
60.0 g
B.
D.
40.0 g
80.0 g
99 Q.24
In an experiment, sulphur dioxide is passed into an iodine solution which is prepared by
dissolving some iodine in potassium iodide solution. Which of the following statements
concerning this experiment is correct?
A.
B.
C.
D.
The colour of the iodine solution changes from purple to colourless.
A brown solid is formed.
A displacement reaction occurs.
Sulphur dioxide is oxidized to sulphate ions.
99 Q.29
Which of the following statements concerning household bleach is correct?
A.
B.
C.
D.
The active ingredient of household bleach is sodium hydroxide.
Household bleach is produced by dissolving chlorine in water.
Household bleach can be used as a drain opener.
The raw material for manufacturing household bleach is sodium chloride.
Section 7 / Sect7pp.doc / S. W. Tse / P.20
99 Q.36
The equation below represents the reaction of chlorine with hot concentrated potassium
hydroxide solution:
3Cl2(g) + 6KOH(aq) → 5KCl(aq) + KClO3(aq) + 3H2O(ℓ)
Which of the following statements concerning this reaction is/are correct?
(1) Potassium hydroxide acts as a reducing agent.
(2) The oxidation number of chlorine changes from 0 to -1.
(3) The oxidation number of chlorine changes from 0 to +5.
A.
C.
(1) only
(1) and (3) only
B.
D.
(2) only
(2) and (3) only
99 Q.37
Which of the following substances can react with magnesium to give a colourless gas which
bums with a 'pop' sound?
(1) grapefruit juice
(2) citric acid crystals
(3) household bleach
A.
C.
(1) only
(1) and (3) only
B.
D.
(2) only
(2) and (3) only
99 Q.38
Which of the following reagents is/are commonly stored in brown bottles?
(1) potassium permanganate solution
(2) concentrated sulphuric acid
(3) concentrated nitric acid
A.
C.
(1) only
(1) and (3) only
B.
D.
99 Q.47
Adding potassium nitrate to soil can
increase crop yield.
1st statement
A.
True
B.
True
C.
True/False
D.
False
2nd statement
True
True
False/True
False
(2) only
(2) and (3) only
Potassium nitrate can provide the essential
elements for plant growth.
2nd statement is a correct explanation of the 1st one.
2nd statement is NOT a correct explanation of the 1st one.
Only ONE of the statements is true, the other is false.
-----
Section 7 / Sect7pp.doc / S. W. Tse / P.21
00 Q.4
Metal X forms an oxide. 27.53 g of this oxide contains 24.96 g of X. What is the mole ratio
of X to oxygen in the oxide?
(Relative atomic masses: 0 = 16.0, X = 207.0)
A.
C.
1:1
2:3
B.
D.
1:2
3:4
00 Q.10
Manufacturing ammonia by the Haber process involves the reversible reaction:
N2(g) + 3H2(g) → 2NH3(g)
Which of the following statements concerning the process is INCORRECT?
A.
B.
C.
D.
The forward reaction can go to completion if iron powder is used as a catalyst.
The optimum conditions for the process are 500°C and 200 atm.
The raw materials are derived from air and water.
The forward reaction and backward reaction occur simultaneously.
00 Q.14
Which of the following solutions can react with bromine water to give a colourless solution?
A.
C.
sodium chloride solution
sodium iodide solution
B.
D.
sodium sulphite solution
sodium hypochlorite solution
00 Q.21
Which of the following processes requires a catalyst?
A.
B.
C.
D.
preparation of ethyl ethanoate from ethanoic acid and ethanol
conversion of sulphur trioxide to concentrated sulphuric acid
manufacture of chlorine bleach from brine
reduction of iron(III) oxide to iron
00 Q.23
In an experiment, 21.8g of zinc was treated with 250.0 cm3 of 2.0 M hydrochloric acid. What
volume of hydrogen was liberated at room temperature and pressure?
(Relative atomic mass :Zn = 65.4;
molar volume of gas at room temperature and pressure = 24.0 dm3)
A.
C.
4.0 dm3
8.0 dm3
B.
D.
6.0 dm3
12.0 dm3
Section 7 / Sect7pp.doc / S. W. Tse / P.22
00 Q.25
Which of the following processes is endothermic?
A.
B.
C.
D.
cracking of petroleum fractions
fermentation of glucose solution
manufacture of ammonia by the Haber process
oxidation of sulphur dioxide to sulphur trioxide in the contact process
00 Q.29
Which of the following compounds would react with ammonium chloride on heating?
A.
C.
concentrated nitric acid
sodium hydroxide solution
B.
D.
concentrated hydrochloric acid
magnesium sulphate solution
00 Q.31
Which of the following uses of sulphuric acid is/are correct?
(1) manufacture of soaps
(2) manufacture of paint additives
(3) manufacture of fertilizers
A.
C.
(1) only
(1) and (3) only
B.
D.
(2) only
(2) and (3) only
00 Q.44
Which of the following statements concerning sulphur dioxide are correct?
(1) It can be prepared by heating copper turnings with concentrated sulphuric acid.
(2) It is denser than air.
(3) It can be absorbed by sodium hydroxide solution.
A.
C.
(1) and (2) only
(2) and (3) only
B.
D.
00 Q.47
Chlorine is a better bleaching agent for silk
than sulphur dioxide.
1st statement
A.
True
B.
True
C.
True/False
D.
False
2nd statement
True
True
False/True
False
(1) and (3) only
(1), (2) and (3)
Chlorine bleaches by reduction.
2nd statement is a correct explanation of the 1st one.
2nd statement is NOT a correct explanation of the 1st one.
Only ONE of the statements is true, the other is false.
-----
Section 7 / Sect7pp.doc / S. W. Tse / P.23
00 Q.48
The volume of 10.0 g of gaseous carbon
dioxide is the same as the volume of 10.0 g
of solid carbon dioxide.
1st statement
A.
True
B.
True
C.
True/False
D.
False
2nd statement
True
True
False/True
False
10.0 g of gaseous carbon dioxide contains the
same number of molecules as 10.0 g of solid
carbon dioxide.
2nd statement is a correct explanation of the 1st one.
2nd statement is NOT a correct explanation of the 1st one.
Only ONE of the statements is true, the other is false.
-----
01 Q.10
Consider the reaction:
4H2(g) + Fe3O4(s) → 3Fe(s) + 4H2O(l)
What mass of iron would be obtained if 96.0 cm3 of hydrogen, measured at room temperature
and pressure, is consumed in the reaction?
(Relative atomic mass : Fe = 56.0;
molar volume of gas at room temperature and pressure = 24 dm3)
A.
C.
0.056 g
0.168 g
B.
D.
0.084 g
0.224 g
01 Q.16
Which of the following statements is correct for a soapy detergent but incorrect for a soapless
detergent?
A.
B.
C.
D.
Its structure consists of a hydrophilic part and a hydrophobic part.
It forms lather when shaken with distilled water.
It can be made by reacting a vegetable oil with an alkali.
It acts as an emulsifier in the cleaning process.
01 Q.27
Suppose that the Avogadro number is L. How many atoms does 600 cm3 of oxygen at room
temperature and pressure contain?
(Molar volume of gas at room temperature and pressure + 24 dm3)
A.
C.
1
L
40
25 L
B.
D.
1
L
20
50 L
Section 7 / Sect7pp.doc / S. W. Tse / P.24
01 Q.28
The set-up shown above is best used to collect
A.
C.
ammonia.
nitrogen.
B.
D.
chlorine.
sulphur dioxide.
01 Q.33
Consider the information below about the reaction of hydrogen with chlorine:
H2(g) + Cl2(g) → 2HCl(g)
∆H ＜ 0
Which of the following statements can be deduced from the above information?
(1) Heat is liberated when hydrogen chloride is formed.
(2) Hydrogen and chlorine react at room temperature.
(3) When measured at room temperature and pressure, the total gas volume before the
reaction equals that after the reaction.
A.
C.
(1) only
(1) and (3) only
B.
D.
(2) only
(2) and (3) only
01 Q.40
In which of the following experiments would a gas be produced?
(1)
(2)
(3)
A.
C.
adding water to a solid mixture of citric acid and sodium hydrogencarbonate
adding dilute hydrochloric acid to sodium hypochlorite solution
adding chlorine water to potassium iodide solution
(1) and (2) only
(2) and (3) only
B.
D.
(1) and (3) only
(1), (2) and (3)
01 Q.43
Which of the following are correct descriptions of the uses of sulphuric acid?
(1)
(2)
(3)
A.
C.
treatment of metal surfaces in the electroplating industry
manufacture of paint additives
manufacture of fertilizers
(1) and (2) only
(2) and (3) only
B.
D.
(1) and (3) only
(1), (2) and (3)
Section 7 / Sect7pp.doc / S. W. Tse / P.25
01 Q.47
Bromine water can be used to distinguish
Bromine can be reduced by sodium sulphite to
between sodium sulphate olution and sodium colourless bromide ions, but not by sodium
sulphate.
sulphite solution.
1st statement
A.
True
B.
True
C.
True/False
D.
False
2nd statement
True
True
False/True
False
2nd statement is a correct explanation of the 1st one.
2nd statement is NOT a correct explanation of the 1st one.
Only ONE of the statements is true, the other is false.
-----
02 Q.6
Compound X dissolves in water to give a colourless solution. When chlorine gas is bubbled
into the solution, the solution turns brown. X is probably
A.
C.
ammonium iodide.
sodium sulphite.
B.
D.
iron(II) sulphate.
potassium hydroxide.
02 Q.12
Which of the following reactions does NOT require the use of a catalyst?
A.
B.
C.
D.
conversion of ammonia to nitrogen monoxide
hydration of ethene to give ethanol
oxidation of ethanol to ethanoic acid
fermentation of glucose to give ethanol
02 Q.14
Ammonium dichromate, (NH4)2Cr2O7, decomposes on heating to give chromium(III) oxide,
water and nitrogen. What mass of water is obtained when 126 g of ammonium dichromate
undergoes complete decomposition?
(Relative atomic masses: H = 1.0, N = 14.0, O = 16.0, Cr = 52.0)
A.
C.
9g
36 g
B.
D.
18 g
72 g
02 Q.16
Gases X and Y react to give a gaseous product Z. The reaction can be represented by the
equation:
X(g) + 3Y(g) → 2Z(g)
In an experiment, 40 cm3 of X and 60 cm3 of Y are mixed and are allowed to react in a closed
vessel. What is the volume of the resultant gas mixture?
(All volumes are measured at room temperature and pressure.)
A.
C.
40 cm3
80 cm3
B.
D.
60 cm3
100 cm3
Section 7 / Sect7pp.doc / S. W. Tse / P.26
02 Q.23
Which of the following gases contains the greatest number of molecules at room temperature
and pressure?
(Relative atomic masses: H = 1.0, N = 14.0, O = 16.0, Cl = 35.5)
A.
C.
2.0 g of hydrogen
18.0 g of ammonia
B.
D.
16.0 g of oxygen
60.0 g of chlorine
02 Q.25
Which of the following statements concerning the Haber process is INCORRECT?
A.
B.
C.
D.
Nitrogen and hydrogen undergo complete reaction in the reaction chamber.
Nitrogen and hydrogen are compressed to about 200 atm before they are allowed to
undergo reaction.
The process is operated at about 500℃.
The reaction between nitrogen and hydrogen is exothermic.
02 Q.31
A part of the flow diagram for the Contact process is shown below:
A.
B.
C.
D.
Which of the following combinations is correct ?
Y
X
Air
water
Air
concentrated sulphuric acid
oxygen
sulphur trioxide
oxygen
water
Z
concentrated sulphuric acid
oleum
concentrated sulphuric acid
oleum
Section 7 / Sect7pp.doc / S. W. Tse / P.27
02 Q.38
Which of the following set-ups can be used to dry moist sulphur dioxide gas?
(1)
A.
C.
(1) and (2) only
(2) and (3) only
B.
D.
(1) and (3) only
(1), (2) and (3)
02 Q.39
Which of the following statements concerning Group VII elements and their ions are correct?
(1)
(2)
(3)
A.
C.
Chlorine has the highest oxidizing power among chlorine, bromine and iodine.
Iodine ions have the highest reducing power among chloride, bromide and iodide
ions.
Bromine is a volatile liquid at room temperature and pressure.
(1) and (2) only
(2) and (3) only
B.
D.
(1) and (3) only
(1), (2) and (3)
Section 7 / Sect7pp.doc / S. W. Tse / P.28
02 Q.41
When sulphur dioxide is bubbled into water, a colourless solution is formed. Which of the
following statements concerning the solution are correct?
(1)
(2)
(3)
A.
C.
The solution conducts electricity better than water.
The solution can change iron(III) sulphate solution from yellow to green.
The solution can change potassium bromide solution from colourless to brown.
(1) and (2) only
(2) and (3) only
B.
D.
(1) and (3) only
(1), (2) and (3)
B.
D.
(1) and (3) only
(1), (2) and (3)
02 Q.42
In which of the following is ammonia used?
(1)
(2)
(3)
A.
C.
the manufacture of nitric acid
the making of fertilizers
the making of antiacids
(1) and (2) only
(2) and (3) only
03 Q.4
Which of the following statements concerning nitric acid is INCORRECT?
A.
C.
It is manufactured from ammonia.
It is used to make fertilizers.
B.
D.
It is used to make explosives.
It is a dehydrating agent.
03 Q.6
Sodium azide, NaN3, is used in air bags in cars. When there is a serious collision, the azide will
decompose to give nitrogen. The decomposition can be represented by the equation:
2NaN3(s) → 2Na(s) + 3N2(g)
What is the mass of sodium azide required to produce 72 dm3 of nitrogen at room temperature
and pressure?
(Relative atomic masses: N = 14.0, Na = 23.0;
molar volume of gas at room temperature and pressure – 24 dm3)
A.
C.
65.0 g
195.0 g
B.
D.
130.0g
292.5 g
03 Q.13
Which of the following substances will NOT react with bromine water?
A.
C.
propene
potassium iodide solution
B.
D.
sulphur dioxide
ammonium chloride solution
Section 7 / Sect7pp.doc / S. W. Tse / P.29
03 Q.21
Which of the following solutions would NOT undergo a colour change when mixed with
sodium sulphite solution?
A.
C.
iodine solution
chromium(III) sulphate solution
B.
D.
acidified potassium permanganate solution
iron(III) sulphate solution
03 Q.22
X is a bleaching agent. X bleaches a dye by oxidation and becomes Y at the end of the reaction.
Which of the following combinations is correct?
A.
B.
C.
D.
.X
Cl2(aq)
Cl2(aq)
SO2(aq)
SO2(aq)
Y
Cl-(aq)
OCl-(aq)
SO32-(aq)
SO42-(aq)
03 Q.27
Which of the following pairs of substances can be distinguished by using dilute hydrochloric
acid?
A.
C.
NaCl and NaOCl
K2CO3 and KHCO3
B.
D.
NH4Br and NH4I
CaO and Ca(OH)2
03 Q.34
The reaction of ammonia with oxygen can be catalysed by red-hot platinum. Which of the
following statements concerning this reaction is/are correct?
(1)
(2)
(3)
A.
C.
The reaction gives nitrogen monoxide and water as the major products.
The reaction gives nitrogen dioxide and water as the major products.
The reaction to exothermic.
(1) only
(1) and (3) only
B.
D.
(2) only
(2) and (3) only
03 Q.39
Which of the following statements concerning sulphur is/are correct?
(1)
(2)
(3)
A.
C.
It is yellow in colour.
It dissolves in water to give an acidic solution
It is used as a raw material in the Contact process.
(1) only
(1) and (3) only
B.
D.
(2) only
(2) and (3) only
Section 7 / Sect7pp.doc / S. W. Tse / P.30
03 Q.44
Which of the following statements concerning chlorine are correct?
(1)
(2)
(3)
A.
C.
It turns blue litmus solution red and then colourless.
It is used to manufacture sodium chloride.
It is denser than air.
(1) and (2) only
(2) and (3) only
B.
D.
(1) and (3) only
(1), (2) and (3)
Section 7 / Sect7pp.doc / S. W. Tse / P.31
M.C. Answer
85
10
11
43
94
14
21
39
47
03
4
6
13
21
22
27
34
39
44
C
D
A
A
C
D
C
86
16
22
95
6
17
19
28
31
38
D
D
87
5
6
34
A
A
C
C
D
A
96
11
15
17
19
21
32
37
B
A
C
88
4
16
37
B
A
C
C
B
B
D
97
17
21
25
34
43
44
45
C
B
A
C
C
D
B
B
B
B
89
4
6
15
16
17
18
19
42
98
10
12
20
28
30
32
34
37
38
41
42
46
C
B
B
C
D
B
C
B
C
C
C
B
C
D
B
A
B
A
A
C
90
8
11
29
47
99
7
9
15
16
24
29
36
37
38
47
A
A
A
B
C
B
B
D
D
D
D
A
C
A
91
3
19
21
31
32
37
41
45
00
4
10
14
21
23
25
29
31
44
47
48
C
A
D
D
B
D
A
A
D
A
B
A
B
A
C
D
D
D
C
92
6
8
13
16
32
01
10
16
27
28
33
40
43
47
B
A
D
C
A
C
C
B
C
C
A
D
A
93
9
25
27
28
44
47
B
C
B
A
B
A
02
6
12
14
16
23
25
31
38
39
41
42
A
C
C
B
C
A
B
B
D
A
A
Section 7 / Sect7pp.doc / S. W. Tse / P.32