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Question

Calculate the volume of gas liberated at the anode at STP during the electrolysis of a CuSO4 solution by a current of 1 A passed for 16 minutes and 5 seconds.

A
224 mL
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B
56 mL
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C
112 mL
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D
448 mL
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Solution

The correct option is A 56 mL
Given:-
Current, I=1A

Time, t=16 min 5 sec= 965 seconds

n=2

Cu+2+2eCu

4OH1O2+2H2O+4e1

W=I×t×MnF

W=1×965×63.52×96500

W=0.3175g

2×63.5g22.4 litreO2

0.3175g0.317563.5×2×22.4

Volume of gas liberated during electrolysis = 56 ml

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