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Question

If 96500 coulombs of electricity liberates one gram equivalent of anysubstance, the time taken for a current of 0.15 amperes to deposite20mg of copper from a solution of copper sulphate is (Chemicalequivalent of copper = 32)

A

5 min 20 sec

B

6 min 42 sec

C

4 min 40 sec

D

5 min 50 sec

Medium

Solution

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Correct option is
B

6 min 42 sec

It is known that mass deposited
 = 6.7 min = 6 min 42 sec 

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