WAEC Chemistry questions: Electrolysis

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

All topics Acids, bases and salts · 26 Air · 16 Atomic structure and bonding · 26 Chemical combination · 27 Chemical equilibrium · 16 Chemistry and industry · 17 Electrolysis · 19 Energy changes · 16 Environmental pollution · 15 Kinetic theory of matter and gas laws · 18 Metals and their compounds · 23 Non-metals and their compounds · 22 Organic compounds · 29 Oxidation and reduction · 19 Rates of chemical reaction · 16 Separation of mixtures and purification · 18 Solubility · 16 Water · 18

Question 1· Electrolysis· WAEC
During the electrolysis of dilute sulphuric acid with platinum electrodes, the gas at the anode is
Explanation and discussion
Question 2· Electrolysis· WAEC
In the purification of copper, the impure copper is made the
Explanation and discussion
Question 3· Electrolysis· WAEC
Electroplating is used to
Explanation and discussion
Question 4· Electrolysis· WAEC
To electroplate an iron spoon with silver, the spoon is made the
Explanation and discussion
Question 5· Electrolysis· WAEC
In the electrolysis of molten sodium chloride, sodium is formed at the
Explanation and discussion
Question 6· Electrolysis· WAEC
Electrolysis of concentrated brine gives at the cathode
Explanation and discussion
Question 7· Electrolysis· WAEC
Which of these is a non-electrolyte?
Explanation and discussion
Question 8· Electrolysis· WAEC
The mass of copper deposited by 0.2 mol of electrons (Cu = 64, Cu²⁺) is
Explanation and discussion
Question 9· Electrolysis· WAEC
The positive electrode in electrolysis is the
Explanation and discussion
Question 10· Electrolysis· WAEC
In the electrolysis of acidified water, the gas given off at the anode is
Explanation and discussion
Question 11· Electrolysis· WAEC
What mass of silver is deposited when 9650 C pass through silver trioxonitrate(V) solution? [Ag = 108, F = 96 500 C]
Explanation and discussion
Question 12· Electrolysis· WAEC
During the electrolysis of copper(II) tetraoxosulphate(VI) solution with copper electrodes, the anode
Explanation and discussion
Question 13· Electrolysis· WAEC
During electrolysis, positive ions move towards the
Explanation and discussion
Question 14· Electrolysis· WAEC
A substance that conducts electricity when molten or in solution and is decomposed by it is
Explanation and discussion
Question 15· Electrolysis· WAEC
How many faradays are needed to deposit one mole of aluminium from Al³⁺ ions?
Explanation and discussion
Question 16· Electrolysis· WAEC
The quantity of electricity passed when 2 A flows for 965 s is
Explanation and discussion
Question 17· Electrolysis· WAEC
Which of these conducts electricity by the movement of ions?
Explanation and discussion
Question 18· Electrolysis· WAEC
In electrolysis, the cathode is the electrode
Explanation and discussion
Question 19· Electrolysis· WAEC
Very dilute sodium chloride solution is electrolysed with inert electrodes. The main gas at the anode is
Explanation and discussion

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WAEC Chemistry questions: Electrolysis

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

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

Electroplating is used to

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

Which of these is a non-electrolyte?

The mass of copper deposited by 0.2 mol of electrons (Cu = 64, Cu²⁺) is

The positive electrode in electrolysis is the

In the electrolysis of acidified water, the gas given off at the anode is

What mass of silver is deposited when 9650 C pass through silver trioxonitrate(V) solution? [Ag = 108, F = 96 500 C]

During the electrolysis of copper(II) tetraoxosulphate(VI) solution with copper electrodes, the anode

During electrolysis, positive ions move towards the

A substance that conducts electricity when molten or in solution and is decomposed by it is

How many faradays are needed to deposit one mole of aluminium from Al³⁺ ions?

The quantity of electricity passed when 2 A flows for 965 s is

Which of these conducts electricity by the movement of ions?

In electrolysis, the cathode is the electrode

Very dilute sodium chloride solution is electrolysed with inert electrodes. The main gas at the anode is