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Question

In a Cu-voltameter, the mass deposited in 30 s is m g. If the time-current graph is shown in the following figure, what is the electrochemical equivalent of Cu?


A
m2
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B
m3
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C
m4
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D
m63.5
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Solution

The correct option is B m3
Total charge passed:
=12×100×10+100×10+100×10+12×100×10
=3×100×10 mA×s
=3000×103 amp s=3 C

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