A certain current liberates 0.5 g of hydrogen in 2 hours. How many grams of copper can be liberated by the same current flowing for the same time in a copper sulphate solution?

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By Faraday's second law:- when the charge passed is same then the ratio of masses deposited at electron through substance will be in the ratio of their equivalent masses. 

mass of copper

The correct answer is ( B) 15.9g

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