1. 7.1 ACIDS AND BASES

2. QUESTION 1 Why is hydrogen chloride, HCl, considered as an acid?
It contains hydrogen.
It contains hydrogen ions.
It ionises in water to produce hydrogen ions.
It ionises in water to produce hydroxide ions.

3. QUESTION 2 Which of the following is a diprotic acid? HCl H2SO4 NH3
CH3COOH

4. QUESTION 3
Which of the following is a monoprotic acid? I HCl II NH3 III H2SO4 IV CH3COOH A. I and II only C. II and III only B. I and IV only D. III and IV only

5. QUESTION 4 A base is a chemical substance that contains hydroxide ions
contains hydrogen ions
ionises in water to produce hydroxonium ions
can neutralise an acid to produce salt an water

6. QUESTION 5 Why is ammonia considered as an alkali?
It contains hydroxide ions.
It ionises in water to produce salt and water.
It ionises in water to produce hydroxonium ions.
It ionises in water to produce free mobile hydroxide ions.

7. QUESTION 6 Which of the following is true? I All alkalis are bases
II All bases are alkalis
III Alkalis are bases that are soluble in water
IV An alkali ionises in water to produce free mobile hydroxide ions.
I and II only C. I, II and III only
II and III only D. I, III and IV only

8. QUESTION 7 Which of the following acids is used to coagulate latex?
Carbonic acid
Ethanoic acid
Methanoic acid
Hydrochloric acid

9. QUESTION 8 Which of the following exhibits alkaline properties?
Dry ammonia gas
Solid sodium hydroxide
Solid potassium hydroxide
Potassium hydroxide solution

10. QUESTION 9 Which of the following turns dry blue litmus paper red?
Glacial ethanoic acid
Hydrogen chloride solution
Ethanoic acid in dry propanone
Hydrogen chloride in dry methylbenzene

11. QUESTION 10 Which of the following contains free mobile
hydroxide ions?
Dry ammonia gas
Dilute sulphuric acid
Dry barium hydroxide
Sodium hydroxide solution

12. QUESTION 11 When hydrogen chloride gas dissolves in water,
the solution that is formed contains
electrons
hydrogen ions
chlorine atoms
hydrogen atoms

13. QUESTION 12 An acid reacts with a base to produce a salt only
water only
a salt and water only
a salt, water and carbon dioxide gas

14. QUESTION 13 Which of the following substances neutralises an
acid to produce salt and water only?
I Sodium hydroxide
II Copper oxide
III Magnesium oxide
IV Calcium carbonate
I and II only C. I, II and III only
II and IV only D. I, III and IV only

15. QUESTION 14 An acid produces a salt, water and carbon
dioxide gas when it reacts with
a metal
an alkali
a metal oxide
a metal carbonate

16. QUESTION 15 Which of the following tests can be used to
investigate the properties of acids?
I Heating with copper oxide
II Test with magnesium ribbon
III Test with sodium carbonate
IV Test with red litmus paper
I and II only C. I, II and III only
II and IV only D. I, III and IV only

17. ANSWERS 1 C 6 D 11 B 2 7 12 3 8 13 4 9 14 5 10 15