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 281· Chemistry and industry· JAMB
The raw materials for the manufacture of cement include:
Explanation and discussion
Question 282· Chemistry and industry· JAMB
The vulcanisation of rubber involves heating it with
Explanation and discussion
Question 283· Chemistry and industry· WAEC
Detergents are preferred to soap in hard water because
Explanation and discussion
Question 284· Chemistry and industry· JAMB
The raw materials for making soap are
Explanation and discussion
Question 285· Electrolysis· JAMB
How much charge is needed to deposit 1 mole of aluminium from Al³⁺ ions? (F = 96 500 C/mol)
Explanation and discussion
Question 286· Electrolysis· JAMB
When a spoon is electroplated with silver, the spoon is made the
Explanation and discussion
Question 287· Electrolysis· WAEC
During the electrolysis of dilute sulphuric acid with platinum electrodes, the gas at the anode is
Explanation and discussion
Question 288· Electrolysis· JAMB
Oxidation always takes place at the
Explanation and discussion
Question 289· Electrolysis· WAEC
In the purification of copper, the impure copper is made the
Explanation and discussion
Question 290· Electrolysis· WAEC
Electroplating is used to
Explanation and discussion
Question 291· Electrolysis· JAMB
During the electrolysis of dilute sulphuric acid with platinum electrodes, the gas liberated at the cathode is:
Explanation and discussion
Question 292· Electrolysis· JAMB
An electrolyte is a compound that
Explanation and discussion
Question 293· Electrolysis· JAMB
Faraday's second law of electrolysis states that, for the same quantity of electricity, the masses of different substances liberated are proportional to their
Explanation and discussion
Question 294· Electrolysis· WAEC
To electroplate an iron spoon with silver, the spoon is made the
Explanation and discussion
Question 295· Electrolysis· WAEC
In the electrolysis of molten sodium chloride, sodium is formed at the
Explanation and discussion
Question 296· Electrolysis· WAEC
Electrolysis of concentrated brine gives at the cathode
Explanation and discussion
Question 297· Electrolysis· JAMB
In the electrolysis of concentrated sodium chloride solution (brine), the gas given off at the anode is
Explanation and discussion
Question 298· Electrolysis· JAMB
What mass of copper is deposited by 0.2 faraday of electricity from Cu²⁺ ions? (Cu = 64)
Explanation and discussion
Question 299· Electrolysis· JAMB
In the electrolytic refining of copper, pure copper is deposited on the
Explanation and discussion
Question 300· Electrolysis· WAEC
Which of these is a non-electrolyte?
Explanation and discussion

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JAMB and WAEC Chemistry questions

The raw materials for the manufacture of cement include:

The vulcanisation of rubber involves heating it with

Detergents are preferred to soap in hard water because

The raw materials for making soap are

How much charge is needed to deposit 1 mole of aluminium from Al³⁺ ions? (F = 96 500 C/mol)

When a spoon is electroplated with silver, the spoon is made the

During the electrolysis of dilute sulphuric acid with platinum electrodes, the gas at the anode is

Oxidation always takes place at the

In the purification of copper, the impure copper is made the

Electroplating is used to

During the electrolysis of dilute sulphuric acid with platinum electrodes, the gas liberated at the cathode is:

An electrolyte is a compound that

Faraday's second law of electrolysis states that, for the same quantity of electricity, the masses of different substances liberated are proportional to their

To electroplate an iron spoon with silver, the spoon is made the

In the electrolysis of molten sodium chloride, sodium is formed at the

Electrolysis of concentrated brine gives at the cathode

In the electrolysis of concentrated sodium chloride solution (brine), the gas given off at the anode is

What mass of copper is deposited by 0.2 faraday of electricity from Cu²⁺ ions? (Cu = 64)

In the electrolytic refining of copper, pure copper is deposited on the

Which of these is a non-electrolyte?