October/November 2019-11
18 Sodium hydroxide is added to a solution to alter its pH. A neutral solution is formed.
Which statement is correct?
A
Sodium hydroxide is an acid and reacts with an alkali to form water as a product.
B
Sodium hydroxide will lower the pH of the solution.
C
The pH of the neutral solution is 14.
D
The pH of the solution before sodium hydroxide is added is below 7.
19 Sodium chloride is dissolved in distilled water. Universal indicator is added to the solution.
What is the colour of the universal indicator?
A
blue (weak alkali)
B
green (neutral)
C
purple (strong alkali)
D
red (acidic)
23 Three statements about the elements carbon, nitrogen and sulfur are shown.
1
They are in groups next to each other in the Periodic Table.
2
Their neutron to proton ratios are all two to one.
3
They each form an acidic oxide.
Which statements are correct?
A
1, 2 and 3
B
1 and 2 only
C
1 and 3 only
October/November 2019-12
18 Solution T has the following properties.
1
It reacts with magnesium forming a gas.
2
It reacts with calcium carbonate forming a gas.
Which statement about solution T is correct?
A
It contains more OH ions than H + ions.
B
It has pH 9.
C
Its reaction with calcium carbonate produces hydrogen.
D
It reacts with aqueous ammonia.
–
D
2 and 3 only
May/June 2019-11
21 Why is ethanoic acid described as a weak acid?
A
It is an organic acid.
B
It is a poor conductor of electricity.
C
It is only slightly dissociated in water.
D
It reacts only with very reactive metals.
May/June 2019-12
21 Why is ethanoic acid described as a weak acid?
A
It is an organic acid.
B
It is a poor conductor of electricity.
C
It is only slightly dissociated in water.
D
It reacts only with very reactive metals.
October/November 2018-11
20 Three separate mixtures of a solution and a solid are made, as shown in the table.
The mixtures are warmed.
In which mixtures does gas form?
NaOH(aq) and
NH4Cl (s)
H2SO4(aq) and
NH4Cl (s)
H2SO4(aq)
and Mg(s)
A
key
B
= gas forms
C
= no gas forms
D
October/November 2018-12
20 Three separate mixtures of a solution and a solid are made, as shown in the table.
The mixtures are warmed.
In which mixtures does gas form?
NaOH(aq) and
NH4Cl (s)
H2SO4(aq) and
NH4Cl (s)
H2SO4(aq)
and Mg(s)
A
key
B
= gas forms
C
= no gas forms
D
May/June 2018-11
22 A solution of W has the following properties.
●
When added in excess to solid ammonium chloride, a gas is given off that turns
damp red litmus paper blue.
●
When added in excess to a solution of pH 3, the resulting solution has a pH of 13.
What is W?
A
a strong acid
B
a strong base
C
a weak acid
D
a weak base
34 Which pair of gases are both non-acidic?
A
ammonia and methane
B
carbon dioxide and ammonia
C
methane and nitrogen dioxide
D
nitrogen dioxide and carbon dioxide
May/June 2018-12
22 Lead(II) oxide, PbO, reacts with dilute nitric acid, neutralising the acid. Lead(II) oxide also reacts
with aqueous sodium hydroxide, neutralising the alkali.
Which word best describes lead(II) oxide?
A
acidic
B
alkaline
C
amphoteric
D
basic
34 Which pair of gases are both non-acidic?
A
ammonia and methane
B
carbon dioxide and ammonia
C
methane and nitrogen dioxide
D
nitrogen dioxide and carbon dioxide
October/November 2017-11
22 Which statement is correct?
A
Ammonia is produced when an ammonium salt is warmed with a dilute acid.
B
Amphoteric oxides are oxides of certain metals.
C
A neutral solution does not contain hydroxide ions.
D
Soil with a high pH can be neutralised by adding lime, Ca(OH)2.
October/November 2017-12
23 A household cleaning compound is used to remove calcium carbonate from bathroom surfaces.
The compound reacts with the calcium carbonate to form a soluble salt, carbon dioxide and
water.
What is the pH of this cleaning compound?
A
pH 2
B
pH 7
C
pH 10
D
pH 14
May/June 2017-11
22 Which row shows the order of increasing pH (lowest to highest) for strong acids, strong bases,
weak acids and weak bases at the same concentration?
pH
A
strong acids
weak acids
weak bases
strong bases
B
strong bases
weak bases
weak acids
strong acids
C
weak acids
strong acids
weak bases
strong bases
D
weak bases
strong bases
strong acids
weak acids
31 A farmer spread ammonium nitrate, a nitrogenous fertiliser, on a field. The next day he spread
calcium hydroxide on the same field. This caused a loss of nitrogen from the ammonium nitrate.
Which chemical reaction occurred?
A
The calcium ions reacted with the ammonium ions, producing ammonia gas.
B
The calcium ions reacted with the nitrate ions, producing oxides of nitrogen.
C
The hydroxide ions reacted with the ammonium ions, producing ammonia gas.
D
The hydroxide ions reacted with the nitrate ions, producing oxides of nitrogen.
May/June 2017-12
19 Consider the three reactions.
1
reaction between ammonium chloride and calcium hydroxide
2
ethane burning in air
3
reaction between ethanoic acid and ethanol
What is true for all three reactions?
A
Carbon dioxide is formed.
B
Neutralisation takes place.
C
Oxidation takes place.
D
Water is formed.
20 Which statement about weak acids is correct?
A
They are partially ionised.
B
They do not react with metals.
C
They do not react with strong alkalis.
D
Their solutions have pH values in the range 0 to 2.
21 Which gas dissolves in water to give a solution with a pH greater than 7?
A
ammonia
B
carbon dioxide
C
nitrogen dioxide
D
sulfur dioxide
October/November 2016-11
2
Two experiments were carried out.
In experiment 1, ammonium carbonate was reacted with dilute hydrochloric acid.
In experiment 2, ammonium carbonate was heated with aqueous sodium hydroxide.
In each experiment, the gas evolved was tested with damp blue litmus paper and damp red
litmus paper.
damp blue
litmus
paper
damp red
litmus
paper
damp blue
litmus
paper
dilute
hydrochloric acid
damp red
litmus
paper
aqueous
sodium hydroxide
ammonium
carbonate
ammonium
carbonate
heat
experiment 1
experiment 2
Which row correctly shows the colour of both the pieces of litmus paper at the end of each
experiment?
experiment 1
experiment 2
A
blue
blue
B
blue
red
C
red
blue
D
red
red
21 Which row shows the pH values for 0.1 mol / dm3 solutions of ammonia, hydrochloric acid,
sodium chloride and sodium hydroxide?
pH values
NH3
HCl
NaCl
NaOH
A
1
7
13
11
B
7
1
11
13
C
11
1
7
13
D
13
11
7
1
October/November 2016-12
May/June 2016-11
1
Which oxide is amphoteric?
A
Al 2O3
B
CO2
C
Na2O
D
SO2
25 The pH of an aqueous solution of hydrochloric acid is 2.
What will be the pH of the acid after the addition of 10 g of sodium chloride?
A
B
1
C
2
D
7
9
May/June 2016-12
19 The pH of an aqueous solution of hydrochloric acid is 2.
What will be the pH of the acid after the addition of 10 g of sodium chloride?
A
1
B
2
C
7
D
9
October/November 2015-11
3
In a titration between an acid (in the burette) and an alkali, you may need to re-use the same
titration flask.
Which is the best procedure for rinsing the flask?
A
Rinse with distilled water and then with the alkali.
B
Rinse with tap water and then with distilled water.
C
Rinse with tap water and then with the acid.
D
Rinse with the alkali.
24 Which pair of substances reacts to form a salt and water only?
A
aqueous sodium chloride and aqueous silver nitrate
B
aqueous sodium hydroxide and dilute ethanoic acid
C
aqueous sodium carbonate and dilute sulfuric acid
D
zinc and dilute hydrochloric acid
26 Which reaction does not involve neutralisation?
A
H2SO4(aq) + 2NH3(aq) → (NH4)2SO4(aq)
B
H2SO4(aq) + BaCl 2(aq) → BaSO4(s) + 2HCl (aq)
C
H2SO4(aq) + CuO(s) → CuSO4(aq) + H2O(l)
D
H2SO4(aq) + 2NaOH(aq) → Na2SO4(aq) + 2H2O(l)
October/November 2015-12
2
In a titration between an acid (in the burette) and an alkali,
you may need to re-use the same titration flask.
Which is the best procedure for rinsing the flask?
A
Rinse with distilled water and then with the alkali.
B
Rinse with tap water and then with distilled water.
C
Rinse with tap water and then with the acid.
D
Rinse with the alkali.
26 Which reaction does not involve neutralisation?
A
H2SO4(aq) + 2NH3(aq) → (NH4)2SO4(aq)
B
H2SO4(aq) + BaCl 2(aq) → BaSO4(s) + 2HCl (aq)
C
H2SO4(aq) + CuO(s) → CuSO4(aq) + H2O(l)
D
H2SO4(aq) + 2NaOH(aq) → Na2SO4(aq) + 2H2O(l)
May/June 2015-11
18 Which row correctly describes the oxides?
Al 2O3
K2O
MgO
SO2
A
basic
acidic
acidic
amphoteric
B
acidic
basic
amphoteric
acidic
C
amphoteric
basic
amphoteric
acidic
D
amphoteric
basic
basic
acidic
May/June 2015-12
20 A colourless solution reacts with magnesium to form a salt and hydrogen gas.
How is this solution acting?
A
as a base
B
as a reducing agent
C
as a solvent
D
as an acid
30 Hydrides are compounds of an element and hydrogen only.
Which statement is not correct?
A
The hydride of carbon that contains four hydrogen atoms and one carbon atom, is a gas
called methane.
B
The hydride of chlorine dissolves in water to form an alkaline solution.
C
The hydride of nitrogen is manufactured in the Haber process.
D
The hydride of oxygen is a liquid at room temperature.
October/November 2014-11
21 Which statement about amphoteric oxides is not correct?
A
They dissolve in water.
B
They are formed only by metals.
C
They react with aqueous sodium hydroxide to give salts.
D
They react with aqueous acids to give salts.
October/November 2014-12
17 Which row correctly classifies the oxides in the table?
carbon dioxide
copper(II) oxide
zinc oxide
A
acidic
amphoteric
basic
B
acidic
basic
amphoteric
C
acidic
neutral
amphoteric
D
basic
neutral
neutral
May/June 2014-11
13 Which solution containing one mole per dm3 of the compound would have the lowest pH?
A
ethanoic acid
B
hydrochloric acid
C
sodium chloride
D
sodium hydrogencarbonate
14 Which statement about oxides is correct?
A
A basic oxide is an oxide of a non-metal.
B
Acidic oxides contain ionic bonds.
C
An amphoteric oxide contains a metal.
D
Basic oxides are always gases.
May/June 2014-12
16 Which substance does not react with hydrochloric acid?
A
zinc carbonate
B
zinc hydroxide
C
zinc metal
D
zinc nitrate
21 Samples of three oxides, X, Y and Z, were added separately to dilute hydrochloric acid and to
dilute sodium hydroxide.
X and Y react with dilute hydrochloric acid but Z does not react.
Y and Z react with aqueous sodium hydroxide but X does not react.
Which type of oxide are each of X, Y and Z?
type of oxide
acidic
amphoteric
basic
A
X
Y
Z
B
Y
X
Z
C
Z
X
Y
D
Z
Y
X
28 Which ion causes the acidity in dilute hydrochloric acid?
A
Cl –
B
October/November 2013-11
October/November 2013-11
H+
C
H2+
D
OH–