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What current is to be passed for 0.25 s for deposition of a certain weight of metal which is equal to its electrochemical equivalent ?

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2 A

4 A

200 A

100 A

answer is A.

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Detailed Solution

From Faraday's laws:

Given that w = Z ( e.c.e )

but we know Z x F = E

E = Eit \Rightarrow it = 1 \Rightarrow i = \frac{1}{t} = \frac{1}{{0.25}} = 4amp

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