A) 31.75 g
B) 63.5 g
C) 0.3175 g
D) 3.175 g
Correct Answer: C
Solution :
According to Faradays first law of electrolysis, 1g equivalent of a metal is obtained by passing 96500 coulomb of electricity. Hence, quantity of copper obtained, by passing 965 coulombs \[=\frac{1}{96500/965}=\frac{1}{100}g.\,\,\text{equivalent}\] \[=\frac{1}{100}\times 31.75=0.3175\,g\]
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