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Question

Statement 1: During the electrolysis of water, the volume of gas obtained at anode is more than the volume of gas obtained at cathode.

Statement 2: Hydrogen is obtained at cathode and oxygen is obtained at anode during the electrolysis of water.

A
Both assertion and reason are true and reason is the correct explanation of assertion.
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B
Both assertion and reason are true but reason is not the correct explanation of assertion.
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C
Assertion is true but reason is false.
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D
Assertion is false but reason is true.
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Solution

The correct option is A Assertion is false but reason is true.
The chemical formula of water is H2O. During its electrolysis, hydrogen and oxygen gases are collected at cathode and anode respectively.

The volume of hydrogen gas collected at cathode is double the volume of the oxygen gas collected at the anode which is according to the following reaction:

2H2O (l) 2H2(g) + O2(g)

Hence, statement 1 is incorrect but statement 2 is correct.

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