Higher Chemistry
Unit 3
Section 4 Acids and Bases
Multiple Choice Questions
This is designed to be used by teachers to help students develop
skills in answering multiple choice questions.
Douglas Racey, Waid Academy, Anstruther, Fife, Scotland
Higher Chemistry
1.
Unit 3 - Section 4
Acids and Bases
Multiple Choice Questions
A trout fishery owner added limestone to
his loch to combat the effects of acid
rain. He managed to raise the pH of the
water from 4 to 6. The concentration of
the H+(aq) ions
A.
B.
C.
D.
increased by a factor of 2
increased by a factor of 100
decreased by a factor of 2
decreased by a factor of 100
Answer
D.
Higher Chemistry
2.
Unit 3 - Section 4
Acids and Bases
Multiple Choice Questions
Which of the following is the same for equal
volumes of 0.1 mol l-1 solutions of sodium
hydroxide and ammonia?
A.
B.
C.
D.
pH of solution
mass of solute present
conductivity of solution
number of moles of hydrochloric acid
needed for neutralisation
Answer
D.
Higher Chemistry
3.
Unit 3 - Section 4
Acids and Bases
Multiple Choice Questions
Ethanoic acid is referred to as a weak acid
because in water
A.
B.
C.
D.
there is partial ionisation of the O-H
bond
it has a pH of about 4
it produces only one H+(aq) ion per
molecule
it is not very soluble
Answer
A.
Higher Chemistry
4.
Unit 3 - Section 4
Acids and Bases
Multiple Choice Questions
When a certain solution is diluted, its
conductivity decreases but its pH
remains constant. The solution could be
A.
B.
C.
D.
ethanoic acid
sodium chloride
sodium hydroxide
nitric acid
Answer
B.
Higher Chemistry
5.
Unit 3 - Section 4
Acids and Bases
Multiple Choice Questions
The concentration of OH- (aq) ions in a
solution is 1 x 10-2 mol l-1. What is the
concentration of H+(aq) ions, in mol l-1?
A.
B.
C.
D.
1 x 10-2
1 x 10-5
1 x 10-9
1 x 10-12
Answer
D.
Higher Chemistry
6.
Unit 3 - Section 4
Acids and Bases
Multiple Choice Questions
A fully dissociated acid is progressively diluted
by the addition of water. Which of the following
would increase with increasing dilution?
A.
B.
C.
D.
the pH value
the electrical conductivity
the rate of its reaction with chalk
the volume of alkali which it will
neutralise
Answer
A.
Higher Chemistry
7.
Unit 3 - Section 4
Acids and Bases
Multiple Choice Questions
Equal volumes of 1 mol l-1 solutions of ethanoic
acid and hydrochloric acid are compared. In which
of the following cases does the ethanoic acid give
the higher value?
A.
the pH value
B.
C.
D.
the electrical conductivity
the rate of its reaction with magnesium
the volume of sodium hydroxide which it
will neutralise
Answer
A.
Higher Chemistry
Unit 3 - Section 4
Acids and Bases
Multiple Choice Questions
8. Which of the following salts will have a
pH greater than 7?
A. potassium chloride
B. potassium nitrate
C. potassium ethanoate
D. potassium sulphate
Answer
C.
Higher Chemistry
Unit 3 - Section 4
Acids and Bases
Multiple Choice Questions
9. The pH of ammonium chloride solution
will be
A. exactly 7
B. more than 7
C. less than 7
D. exactly 14
Answer
C.
Higher Chemistry
Unit 3 - Section 4
Acids and Bases
Multiple Choice Questions
10. The pH of a solution of hydrochloric acid was
found to be 2.5. The concentration, in mol l-1,
of the H+(aq) ions must be
A. greater than 0.1
B. between 0.1 and 0.01
C. between 0.01 and 0.001
D. less than 0.001
Answer
C.