JAMB and WAEC Chemistry questions

800 questions with answers and explanations. Tap an option to check yourself.

All topics Acids, bases and salts · 58 Air · 37 Atomic structure and bonding · 59 Chemical combination · 58 Chemical equilibrium · 37 Chemistry and industry · 35 Electrolysis · 41 Energy changes · 38 Environmental pollution · 32 Kinetic theory of matter and gas laws · 45 Metals and their compounds · 47 Non-metals and their compounds · 45 Organic compounds · 72 Oxidation and reduction · 41 Rates of chemical reaction · 38 Separation of mixtures and purification · 42 Solubility · 36 Water · 39

Question 21· Acids, bases and salts· JAMB
Which salt is best prepared by precipitation (double decomposition)?
Explanation and discussion
Question 22· Acids, bases and salts· JAMB
A normal salt is one in which
Explanation and discussion
Question 23· Acids, bases and salts· WAEC
An aqueous solution of pH 12 is
Explanation and discussion
Question 24· Acids, bases and salts· JAMB
A solution of pH 3 is:
Explanation and discussion
Question 25· Acids, bases and salts· JAMB
Efflorescent substances
Explanation and discussion
Question 26· Acids, bases and salts· WAEC
A solution of household bleach has a pH of 12. It is
Explanation and discussion
Question 27· Acids, bases and salts· JAMB
Which oxide dissolves in water to form an acidic solution?
Explanation and discussion
Question 28· Acids, bases and salts· JAMB
25 cm³ of 0.1 mol/dm³ hydrochloric acid is mixed with 25 cm³ of 0.1 mol/dm³ sodium hydroxide. The resulting solution is
Explanation and discussion
Question 29· Acids, bases and salts· WAEC
According to Brønsted-Lowry, an acid is a
Explanation and discussion
Question 30· Acids, bases and salts· JAMB
A solution of sodium trioxocarbonate(IV) in water is alkaline because of
Explanation and discussion
Question 31· Acids, bases and salts· WAEC
The reaction of an acid with a base to form a salt and water only is called
Explanation and discussion
Question 32· Acids, bases and salts· JAMB
A solution with a pH of 13 is
Explanation and discussion
Question 33· Acids, bases and salts· WAEC
25.0 cm³ of 0.10 mol/dm³ sodium hydroxide is exactly neutralised by 20.0 cm³ of hydrochloric acid. Find the concentration of the acid.
Explanation and discussion
Question 34· Acids, bases and salts· JAMB
Phenolphthalein in an alkaline solution is
Explanation and discussion
Question 35· Acids, bases and salts· JAMB
According to Arrhenius, an acid is a substance that in water produces
Explanation and discussion
Question 36· Acids, bases and salts· JAMB
25 cm³ of 0.1 mol/dm³ NaOH neutralises 20 cm³ of HCl. The concentration of the acid is:
Explanation and discussion
Question 37· Acids, bases and salts· WAEC
A farmer adds lime to his soil in order to
Explanation and discussion
Question 38· Acids, bases and salts· JAMB
What volume of 0.2 mol/dm³ NaOH neutralises 20 cm³ of 0.1 mol/dm³ H₂SO₄?
Explanation and discussion
Question 39· Acids, bases and salts· WAEC
The reaction between an acid and a base to form salt and water only is called
Explanation and discussion
Question 40· Acids, bases and salts· WAEC
A solution with a pH of 12 is
Explanation and discussion

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JAMB and WAEC Chemistry questions

Which salt is best prepared by precipitation (double decomposition)?

A normal salt is one in which

An aqueous solution of pH 12 is

A solution of pH 3 is:

Efflorescent substances

A solution of household bleach has a pH of 12. It is

Which oxide dissolves in water to form an acidic solution?

25 cm³ of 0.1 mol/dm³ hydrochloric acid is mixed with 25 cm³ of 0.1 mol/dm³ sodium hydroxide. The resulting solution is

According to Brønsted-Lowry, an acid is a

A solution of sodium trioxocarbonate(IV) in water is alkaline because of

The reaction of an acid with a base to form a salt and water only is called

A solution with a pH of 13 is

25.0 cm³ of 0.10 mol/dm³ sodium hydroxide is exactly neutralised by 20.0 cm³ of hydrochloric acid. Find the concentration of the acid.

Phenolphthalein in an alkaline solution is

According to Arrhenius, an acid is a substance that in water produces

25 cm³ of 0.1 mol/dm³ NaOH neutralises 20 cm³ of HCl. The concentration of the acid is:

A farmer adds lime to his soil in order to

What volume of 0.2 mol/dm³ NaOH neutralises 20 cm³ of 0.1 mol/dm³ H₂SO₄?

The reaction between an acid and a base to form salt and water only is called

A solution with a pH of 12 is