21st Century Chemistry
Multiple Choice Question in Topic 4
Acids and Alkalis
Unit 13
1
Which of the following acids can be found in lemons?
A
Ethanoic acid
B
Citric acid
C
Hydrochloric acid
D
Sulphuric acid
2
Which of the following substances is NOT acidic?
A
Milk of magnesia
B
Vinegar
C
Rain water
D
Orange juice
3
Citric
A
B
C
D
4
Which of the following substances are acidic?
(1) Window cleaner
(2) Gastric juice
(3) Soft drink
A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)
5
Which of the following acids is a solid at room temperature and pressure?
A
Sulphuric acid
B
Nitric acid
C
Ethanoic acid
D
Citric acid
6
Which of the following acids are commonly used in the laboratory?
(1) Hydrochloric acid
(2) Citric acid
(3) Nitric acid
A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)
7
Which of the following substances contain(s) carbonic acid?
(1) Rain water
(2) Orange
(3) Soft drink
A
(1) only
B
(2) only
C
(1) and (3) only
D
(2) and (3) only
acid is commonly found in
milk.
vinegar.
tea.
fruits.
8
Which of the following substances contain citric acid?
(1) Toilet bowl cleaner
(2) Orange
(3) Lemon
A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)
9
Which of the following is NOT a general property of dilute hydrochloric acid?
A
It conducts electricity.
B
It tastes sour.
C
It turns red litmus paper blue.
D
It reacts with magnesium to give out hydrogen.
10
Which of the following substances reacts with dilute hydrochloric acid to give out a gas?
A
Copper
B
Zinc
C
Iron(II) oxide
D
Potassium hydroxide
11
Which of the following substances will NOT react with dilute hydrochloric acid?
A
Magnesium chloride
B
Copper(II) hydroxide
C
Silver nitrate solution
D
Sodium hydrogencarbonate
12
Which of the following are the products of the reaction between magnesium and dilute sulphuric
acid?
A
Magnesium sulphate, sulphur dioxide and water
B
Magnesium hydroxide and hydrogen
C
Magnesium sulphate and hydrogen
D
Magnesium oxide and sulphur dioxide
13
The reaction between hydrochloric acid and calcium carbonate is represented by the following
equation:
2HCl(x) + CaCO3(y) Æ CaCl2(z) + CO2(g) + H2O(l)
Which of the following combinations of state symbols is correct?
x
y
z
A
aq
s
s
B
l
aq
s
C
g
aq
aq
D
aq
s
aq
14
The reaction between dilute hydrochloric acid and magnesium oxide is represented by the
following equation:
wMgO(s) + xHCl(aq) Æ yMgCl2(aq) + zH2O(l)
What are the values of w, x, y and z so that this equation is balanced?
w
x
y
z
A
1
2
1
1
B
2
1
2
1
C
1
2
2
1
D
2
1
1
2
15
When iron is added to dilute sulphuric acid, a gas is given off. Which of the following statements
concerning the gas given off is correct?
A
It turns limewater milky.
B
It turns moist litmus paper blue.
C
It gives a 'pop' sound with a burning splint.
D
It dissolves in water to form an acidic solution.
16
When sodium hydrogencarbonate is added to dilute sulphuric acid, a gas is given off. Which of the
following statements concerning the gas given off is INCORRECT?
A
It dissolves in water to form an alkaline solution.
B
It turns limewater milky.
C
It extinguishes a burning splint.
D
It is odourless.
17
A soluble powder X gives a brick red flame in flame test. It shows effervescence on addition of
dilute hydrochloric acid. X is probably
A
KOH.
B
Na2CO3.
C
Ca(HCO3)2.
D
CaCO3.
18
Which of the following metals can be used to make a container for dilute sulphuric acid?
A
Zinc
B
Magnesium
C
Iron
D
Copper
19
Solution X reacts with zinc to give a gas which gives a 'pop' sound with a burning splint. When
silver nitrate solution is added to solution X, white precipitate is formed. What should solution X
be?
A
Ammonia solution
B
Ethanoic acid
C
Hydrochloric acid
D
Potassium chloride
20
The
A
B
C
D
21
Which of the following pairs will NOT produce water when they react?
A
Sodium carbonate and ethanoic acid
B
Silver nitrate and hydrochloric acid
C
Magnesium oxide and dilute sulphuric acid
D
Copper(II) hydroxide and dilute nitric acid
22
Which of the following should not be used to react with dilute hydrochloric acid to prepare
hydrogen?
A
Zinc
B
Magnesium
C
Sodium
D
Calcium
rust on the surface of iron can be removed by
sodium hydroxide pellets.
ammonia solution.
dilute hydrochloric acid.
sodium carbonate solution.
23
What gas will be liberated when zinc is added to lemon juice?
A
Hydrogen
B
Oxygen
C
Carbon dioxide
D
Chlorine
24
Which of the following statements concerning dilute sulphuric acid is/are correct?
(1) It cannot conduct electricity.
(2) It tastes sour.
(3) It has slippery feeling.
A
(1) only
B
(2) only
C
(1) and (3) only
D
(2) and (3) only
25
Which of the following substances conduct electricity?
(1) Dilute hydrochloric acid
(2) Sodium nitrate solution
(3) Pure sulphuric acid
A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)
26
Which of the following statements is/are correct?
(1) All acids turn wet blue litmus paper red.
(2) All acids are liquids at room conditions.
(3) All acids are ionic compounds.
A
(1) only
B
(2) only
C
(1) and (3) only
D
(2) and (3) only
27
Which of the following are the products of the reaction between sodium carbonate and dilute
hydrochloric acid?
(1) Water
(2) Sodium chloride
(3) Carbon dioxide
A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)
28
Which of the following substances would react with hydrochloric acid to give out a gas?
(1) Sodium hydrogencarbonate
(2) Iron
(3) Zinc oxide
A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)
29
Which of the following substances would react with zinc to give out hydrogen?
(1) Dilute nitric acid
(2) Dilute sulphuric acid
(3) Dilute ethanoic acid
A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)
30
What will be observed when zinc granules are put into dilute sulphuric acid?
(1) The zinc granules dissolve.
(2) Gas bubbles are liberated.
(3) Heat energy is given out.
A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)
31
Which of the following substances can react with dilute sulphuric acid?
(1) Copper(II) carbonate
(2) Zinc
(3) Iron(II) hydroxide
A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)
32
Which of the following are observations of the reaction between dilute hydrochloric acid and
copper(II) oxide?
(1) Copper(II) oxide dissolves.
(2) Gas bubbles are liberated.
(3) The solution turns blue.
A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)
33
What will be produced when calcium oxide is added to dilute hydrochloric acid?
(1) Hydrogen
(2) Calcium chloride
(3) Water
A
(1) only
B
(3) only
C
(1) and (2) only
D
(2) and (3) only
34
Which of the following substances is/are NOT the product(s) formed in the reaction between dilute
sulphuric acid and zinc hydroxide?
(1) Hydrogen
(2) Water
(3) Zinc sulphate
A
(1) only
B
(3) only
C
(1) and (2) only
D
(2) and (3) only
35
Which of the following combinations will produce water and magnesium chloride?
(1) Magnesium oxide and dilute hydrochloric acid
(2) Magnesium and hydrochloric acid
(3) Magnesium hydroxide and hydrochloric acid
A
(2) only
B
(3) only
C
(1) and (2) only
D
(1) and (3) only
36
Which of the following statements about dilute sulphuric acid is/are correct?
(1) It reacts with copper.
(2) It does not react with zinc oxide.
(3) When it is added to sodium carbonate, effervescence occurs.
A
(1) only
B
(3) only
C
(1) and (2) only
D
(2) and (3) only
37
Which of the following equations can represent the reaction between dilute hydrochloric acid and
calcium carbonate?
(1) CaCO3(s) + 2H+ (aq) Æ Ca2+(aq) + CO2(g) + H2O(l)
－
(2) CO32 (aq) + 2H+(aq) Æ CO2(g) + H2O(l)
－
(3) HCO3 (aq) + H+(aq) Æ H2O(l) + CO2(g)
A
(1) only
B
(3) only
C
(1) and (2) only
D
(2) and (3) only
38
Which of the following is the best definition of an acid?
A
Acid is a compound which reacts with a base.
B
Acid is a substance which turns moist blue litmus paper red.
C
Acid is a hydrogen-containing compound.
D
Acid is a hydrogen-containing compound which gives out hydrogen ions as the only positive
ion when dissolved in water.
39
Why
A
B
C
D
40
The liberation of hydrogen from the reaction between metals and dilute acids is an indication of
the existence of
A
hydrogen atoms in dilute acids.
B
hydrogen ions in dilute acids.
C
hydrogen gas in dilute acids.
D
hydroxide ions in dilute acids.
41
Solid
A
B
C
D
is hydrochloric acid considered an acid?
Hydrochloric acid is corrosive.
Hydrochloric acid turns blue litmus paper red.
Hydrochloric acid dissolves in water to give out hydrogen ions as the only positive ion.
Hydrochloric acid tastes sour.
citric acid does not turn dry blue litmus paper red because
hydrogen ions are not formed when there is no water.
the ions in dry citric acid are not mobile.
there are no hydrogen atoms in citric acid.
citric acid is an ionic compound when it is dry.
42
Which of the following substances can conduct electricity?
A
Tetrachloromethane
B
Dilute sulphuric acid
C
Solid citric acid
D
Silicon dioxide
43
Which of the following substances can turn a piece of dry pH paper red?
A
Sodium chloride solution
B
Solid citric acid
C
Dilute ethanoic acid
D
Hydrogen chloride gas
44
What will be observed when a magnesium ribbon is put into a solution of hydrogen chloride in
methylbenzene (a non-aqueous solvent) and a solution of hydrogen chloride in water respectively?
Hydrogen chloride in methylbenzene
Hydrogen chloride in water
A
No observable change
No observable change
B
Gas bubbles are given off
No observable change
C
No observable change
Gas bubbles are given off
D
Gas bubbles are given off
Gas bubbles are given off
45
Why
A
B
C
D
46
When a fizzy drink tablet (contains a solid acid and calcium carbonate) is added to water,
effervescence occurs. Which of the following is a reason for this phenomenon?
A
Calcium carbonate reacts with water to give out hydrogen.
B
There are impurities in the tablet which react with water to give out a gas.
C
Hydrogen ions are given out when the tablet is dissolved in water and they react with
calcium carbonate to give out carbon dioxide.
D
Hydrogen atoms are given out when the tablet is dissolved in water and they react with
calcium carbonate to give out carbon dioxide.
47
Which of the following statements concerning dilute acids is/are correct?
(1) The acidic properties of a dilute acid is due to the presence of hydrogen ions in the acid
when dissolved in water.
(2) All dilute acids turn blue litmus paper red.
(3) Aqueous ammonia is an acid because ammonia molecules have hydrogen atoms.
A
(1) only
B
(3) only
C
(1) and (2) only
D
(2) and (3) only
48
Which of the following statements concerning the solution formed by dissolving hydrogen chloride
in methylbenzene is/are correct?
(1) The solution turns dry blue litmus paper red.
(2) The solution cannot conduct electricity.
(3) The pH value of the solution is smaller than 7.
A
(1) only
B
(2) only
C
(1) and (2) only
D
(2) and (3) only
does citric acid in water conduct electricity while solid citric acid does not?
Citric acid in water is an ionic compound while solid citric acid is a covalent compound.
Citric acid in water has mobile ions while solid citric acid does not.
Citric acid in water has hydrogen atoms while solid citric acid does not.
Citric acid in water has mobile electrons while solid citric acid does not.
49
Which of the following equations of ionization of acids are correct?
－
(1) HCl(aq) Æ H+(aq) + Cl (aq)
－
(2) CH3COOH (aq) Æ CH2COOH (aq) + H+(aq)
－
(3) H2SO4(aq) Æ H+(aq) + HSO4 (aq)
A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)
50
Which of the following would react with zinc to give out hydrogen?
(1) Citric acid in water
(2) Cold water
(3) Hydrogen chloride in methylbenzene
A
(1) only
B
(3) only
C
(1) and (2) only
D
(2) and (3) only
51
When hydrogen chloride gas is dissolved in water, which ions can be found in the resulting
solution?
(1) Hydrogen ions, H+(aq)
－
(2) Chloride ions, Cl (aq)
－
(3) Hydroxide ions, OH (aq)
A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)
52
Which of the following substances will NOT react with magnesium?
(1) Hydrogen chloride in methylbenzene
(2) Steam
(3) Dilute sulphuric acid
A
(1) only
B
(3) only
C
(1) and (2) only
D
(2) and (3) only
53
What is the basicity of ethanoic acid?
A
1
B
2
C
3
D
4
54
Which of the following is the best definition of basicity of an acid?
A
Basicity of an acid is the maximum number of hydrogen atoms in an acid molecule.
B
Basicity of an acid is the maximum number of hydrogen ions produced by an acid molecule.
C
Basicity of an acid is the maximum number of hydrogen ions in 1 M of the acid solution.
D
Basicity of an acid is the maximum number of hydrogen atoms produced by an acid
molecule.
55
The
A
B
C
D
basicity of an acid is
a measure of the strength of the acid.
the maximum number of hydroxide ions produced from one acid molecule.
the maximum number of hydrogen ions produced from one acid molecule.
directly proportional to the concentration of the acid.
56
H3PO4 is a tribasic acid. Which of the following formulae is INCORRECT?
A
(NH4)2HPO4
B
NaH2PO4
C
AlPO4
D
KPO4
57
Which of the following acids is/are monobasic?
(1) Hydrochloric acid
(2) Ethanoic acid
(3) Carbonic acid
A
(1) only
B
(3) only
C
(1) and (2) only
D
(2) and (3) only
58
Which of the following statements are correct?
(1) The basicity of nitric acid is 1.
(2) Equal number of moles of hydrogen chloride and sulphuric acid give the same number of
hydrogen ions when they are dissolved in water.
(3) The basicity of phosphoric acid (H3PO4) is greater than that of ethanoic acid (CH3COOH).
A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)
59
Which of the following has/have a basicity of three?
(1) NH3(aq)
(2) H3PO4(aq)
(3) CH3COOH(aq)
A
(2) only
B
(3) only
C
(1) and (2) only
D
(1) and (3) only
60
Which of the following statements are INCORRECT?
(1) Ethanoic acid is monobasic.
(2) The basicity of ammonia is three.
(3) Basicity of an acid is the number of hydrogen atoms in an acid molecule.
A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)
61
Which of the following hazard warning labels should be displayed on a bottle of concentrated
hydrochloric acid?
A
Flammable
B
Corrosive
C
Oxidizing
D
Carcinogenic
62
What should we do if concentrated acid is spilt on our hands?
A
Wash the hands with sodium hydroxide.
B
Wash the hands with ammonia solution.
C
Wash the hands with a large amount of water.
D
Wash the hands with sodium hydrogencarbonate.
63
When we handle concentrated hydrochloric acid, we should wear gloves because concentrated
hydrochloric acid is
A
irritating.
B
toxic.
C
flammable.
D
corrosive.
64
Which of the following is the most appropriate way to dilute concentrated sulphuric acid?
A
Add water into the acid as quickly as possible.
B
Add water into the acid slowly with constant stirring.
C
Add the acid into water as quickly as possible.
D
Add the acid into water slowly with constant stirring.
65
What will happen if water is added to a large amount of concentrated sulphuric acid?
(1) A lot of heat energy will be given out.
(2) The acid may splash out.
(3) A brown gas will be given off.
A
(2) only
B
(3) only
C
(1) and (2) only
D
(1) and (3) only
66
Which of the following statements about concentrated hydrochloric acid and dilute hydrochloric
acid are correct?
(1) Concentrated hydrochloric acid reacts more vigorously with zinc than dilute hydrochloric
acid.
(2) They react with calcium carbonate to give the same products.
(3) They are electrolytes.
A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)
67
Which of the following is NOT a base?
A
Sodium hydroxide
B
Calcium carbonate
C
Copper(II) oxide
D
Ammonia solution
68
What is a base?
A
A base is a
B
A base is a
C
A base is a
D
A base is a
compound
compound
compound
compound
that
that
that
that
contains hydroxide ions.
can react with acids.
turns a moist red litmus paper blue.
reacts with acids to give a salt and water as the only products.
70
Which of the following is NOT alkaline?
A
Milk of magnesia
B
Limewater
C
Soft drink
D
Window cleaner
71
Which of the following is NOT a common alkali found in the laboratory?
A
Sodium hydroxide solution
B
Aluminium hydroxide
C
Ammonia solution
D
Potassium hydroxide solution
72
An element X was burnt in oxygen. The product formed was mixed with water to give a solution of
pH value greater than 7. What might element X be?
A
Sulphur
B
Sodium
C
Carbon
D
Hydrogen
73
Which of the following are alkaline?
(1) Oven cleaner
(2) Toothpaste
(3) Caustic soda
A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)
74
Which of the following statements concerning alkalis is/are correct?
(1) All alkalis react with acids to give water and a salt as the only products.
(2) All alkalis are soluble in water.
(3) All metal hydroxides are alkalis.
A
(1) only
B
(3) only
C
(1) and (2) only
D
(2) and (3) only
75
Which of the following substances is/are alkali(s)?
(1) Ammonia
(2) Calcium hydroxide
(3) Iron(III) hydroxide
A
(1) only
B
(3) only
C
(1) and (2) only
D
(2) and (3) only
76
Which of the following substances are bases?
(1) Calcium oxide
(2) Copper(II) hydroxide
(3) Potassium hydroxide
A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)
77
Which of the following is NOT a general property of an alkali?
A
It does not conduct electricity.
B
It feels slippery.
C
It turns red litmus paper blue.
D
It tastes bitter.
78
Which of the following statements concerning aqueous ammonia is correct?
A
Aqueous ammonia turns blue litmus paper red.
B
Aqueous ammonia dissolves in water to give hydroxide ions.
C
Aqueous ammonia tastes sweet.
D
Aqueous ammonia cannot conduct electricity.
79
Which of the following solutions does NOT produce a precipitate when mixed with potassium
hydroxide solution?
A
Sodium chloride
B
Copper(II) nitrate
C
Iron(III) sulphate
D
Calcium nitrate
80
When sodium hydroxide solution is slowly added to an unknown solution, a dirty green precipitate
is formed. The unknown solution probably contains
A
iron(II) ions.
B
iron(III) ions.
C
aluminium ions.
D
copper(II) ions.
81
Which of the following reagents, when mixed, will produce a precipitate?
A
Ammonium chloride and sodium hydroxide solution
B
Iron(III) chloride solution and ammonia solution
C
Potassium chloride solution and sodium hydroxide solution
D
Dilute hydrochloric acid and calcium hydrogencarbonate solution
82
When ammonium chloride solution is heated with sodium hydroxide solution, a gas is given off.
Which of the following statements concerning the gas is correct?
A
The gas turns limewater milky.
B
The gas relights a glowing splint.
C
The gas turns moist red litmus paper blue.
D
The gas gives a 'pop' sound with a burning splint.
83
When ammonium chloride solution is heated with a solution, a gas which turns moist red litmus
paper blue is given off. The solution probably contains
A
H+(aq).
－
B
OH (aq).
C
Na+(aq).
D
NH4+(aq).
84
Metal X reacts with dilute hydrochloric acid to form a colourless solution. When dilute ammonia
solution is added to the solution, a white precipitate is formed. Metal X may be
A
aluminium.
B
iron.
C
sodium.
D
copper.
85
Which of the following metal ions can be distinguished from the other three by using aqueous
sodium hydroxide solution?
A
Al3+(aq)
B
Fe2+(aq)
C
Zn2+(aq)
D
Pb2+(aq)
86
When ammonium chloride is heated with caustic soda, a gas is given off. What should the gas be?
A
Hydrogen
B
Chlorine
C
Ammonia
D
Oxygen
87
The reaction between potassium hydroxide and iron(II) sulphate is represented by the following
equation:
FeSO4(x) + 2KOH(y) Æ Fe(OH)2(z) + K2SO4(aq)
Which of the following combinations of state symbols is correct?
x
y
z
A
s
l
s
B
aq
aq s
C
s
l
aq
D
aq
aq aq
88
When ammonium chloride is heated with sodium hydroxide, the following reaction will take place:
NH4Cl(aq) + NaOH(aq) Æ NH3(x) + H2O(y) + NaCl(z)
Which of the following combinations of state symbols is correct?
x
y
z
A
g
l
aq
B
aq
l
s
C
g
aq aq
D
aq
aq s
89
When sodium hydroxide is added to solution Y, a blue precipitate is formed. What might solution Y
be?
A
Zinc nitrate
B
Ammonium chloride
C
Copper(II) sulphate
D
Iron(II) nitrate
90
Which of the following substances will NOT react with sodium hydroxide solution?
A
Vinegar
B
Ammonium chloride
C
Potassium sulphate solution
D
Copper(II) nitrate solution
91
When solution X is heated with sodium hydroxide, a colourless gas which turns moist red litmus
paper blue is given off. When calcium chloride is added to the solution, a white precipitate is
formed. What might solution X be?
A
Ammonium sulphate
B
Ammonium chloride
C
Potassium sulphate
D
Potassium chloride
92
Which of the following reagents can be used to distinguish between sodium nitrate and zinc
nitrate?
A
Hydrochloric acid
B
Copper
C
Ammonia solution
D
Magnesium sulphate
93
Which of the following solutions can be used to distinguish between ammonia solution and sodium
hydroxide solution?
A
Sodium sulphate solution
B
Iron(II) chloride solution
C
Lead(II) nitrate solution
D
Magnesium chloride solution
94
Metal X reacts with dilute hydrochloric acid to give a colourless solution. On addition of aqueous
ammonia to the solution, a white precipitate is formed which dissolves in excess aqueous
ammonia to give a colourless solution. X is
A
calcium.
B
copper.
C
aluminium.
D
zinc.
95
Which of the following substances can react with sodium hydroxide solution?
(1) Aluminium chloride solution
(2) Solid citric acid
(3) Ammonium sulphate
A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)
96
When sodium hydroxide solution is added to solution Z, a white precipitate is formed which is
insoluble in excess sodium hydroxide solution. What should solution Z be?
A
Magnesium chloride
B
Aluminium nitrate
C
Zinc sulphate
D
Copper(II) sulphate
97
In a flame test, solid X gives a purple flame. When the solid is dissolved in water, the solution
formed turns red litmus paper blue. What might solid X be?
(1) Potassium oxide
(2) Sodium hydroxide
(3) Potassium hydrogencarbonate
A
(1) only
B
(2) only
C
(1) and (3) only
D
(2) and (3) only
98
Which of the following are characteristics of sodium hydroxide solution?
(1) It reacts with hydrochloric acid to produce sodium chloride and water.
(2) It conducts electricity.
(3) It feels slippery.
A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)
99
Which of the following combinations are correct when sodium hydroxide is added to the following
solutions?
Solution
Colour of the precipitate formed
(1) CuSO4(aq)
blue
(2) ZnCl2(aq)
white
(3) Fe(NO3)2(aq)
brown
A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)
100 Which of the following substances would react with potassium hydroxide solution?
(1) Vinegar
(2) Copper(II) chloride solution
(3) Ammonium chloride solution
A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)
101 Which of the following substances will form a precipitate with calcium hydroxide solution?
(1) Sodium sulphate solution
(2) Zinc nitrate solution
(3) Carbon dioxide gas
A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)
102 When ammonium sulphate is heated with sodium hydroxide, which of the following substances will
be formed?
(1) Water
(2) Hydrogen
(3) Sodium sulphate
A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)
103 Which of the following solutions will form a white precipitate with potassium hydroxide solution?
(1) Calcium nitrate
(2) Copper(II) chloride
(3) Zinc sulphate
A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)
104 Which of the following methods can be used to distinguish between sodium chloride solution and
zinc nitrate solution?
(1) Adding acidified silver nitrate solution
(2) Adding a magnesium ribbon
(3) Adding potassium hydroxide solution
A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)
105 Which of the following hydroxides is/are coloured?
(1) Fe(OH)3
(2) Cu(OH)2
(3) KOH
A
(1) only
B
(3) only
C
(1) and (2) only
D
(2) and (3) only
106 Which of the following substances can turn dry red litmus paper blue?
A
Sodium hydroxide pellets
B
Calcium hydroxide solution
C
Ammonia gas
D
Sodium chloride solution
107 Which of the following equations is correct?
－
A
NH3(g) Æ NH2 (aq)+ H+(aq)
B
NaOH(aq) Æ Na(s) + OH(l)
－
C
NH3(g) + H2O(l) Æ NH4+(aq) + OH (aq)
－
D
NaOH(aq) + H2O(l) Æ NaOH2+(aq) + OH (aq)
108 Which of the following do(es) NOT turn dry red litmus paper blue?
(1) Sodium carbonate solution
(2) Dry ammonia gas
(3) Limewater
A
(1) only
B
(2) only
C
(1) and (3) only
D
(2) and (3) only
109 Which of the following labels should be displayed on a bottle containing concentrated sodium
hydroxide solution?
A
Flammable
B
Oxidizing
C
Carcinogenic
D
Corrosive
110 When concentrated sodium hydroxide solution gets into your eyes, what should you do?
A
Wash the eyes with hydrochloric acid
B
Wash the eyes with plenty of water
C
Wash the eyes with aqueous ammonia
D
Wash the eyes with vinegar
111 When a chicken's foot is immersed in concentrated sodium hydroxide solution for a few days, it
becomes translucent and the flesh becomes soft. Which of the following properties of
concentrated sodium hydroxide solution is shown?
A
Corrosiveness
B
Oxidizing property
C
Flammability
D
Toxicity
112 Which of the following statements are INCORRECT?
(1) Acids do more damage to the skin and eyes than alkalis.
(2) Potassium hydroxide is often called caustic soda.
(3) Dilute sodium hydroxide solution gives a white precipitate with zinc nitrate while
concentrated sodium hydroxide solution does not.
A
(1) and (2) only
B
(1) and (3) only
C
(2) and (3) only
D
(1), (2) and (3)