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Question

In an electroplating experiment , m gram of silver is deposited when 4A current flows for 2min. How many gram of silver will be deposited by 6A current flowing for 40s ?

A
m
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B
0.5m
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C
1.2m
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D
2m
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Solution

The correct option is B 0.5m
From Faraday's first law of Electrolysis:-

Qm=constantItm=constant

Hence, I2t2m2=I1t1m1

6×40m2=4×120m

m2=0.5m

Answer-(B)

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