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Question

If 0.224 litre of H2 gas is formed at the cathode, in the electrolysis of water the volume of O2 gas formed at the anode under identical conditions is:

A
0.20 L
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B
0.015 L
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C
0.112 L
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D
None of these
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Solution

The correct option is C 0.112 L
Electrolysis of water:

H2OH2+12O2

Under identical conditions of T, P, and V
Moles are directly proportional to the volume
Therefore the volume of O2 will be half of H2

Given: VH2=0.224 L

VO2=0.2242 L

C is correct

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