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Q.

The mass of copper deposited from a solution of CuSO4 by passage of 5 A current for 965 second is

(Mol. wt. of Copper = 63.5)

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a

15.875 g

b

96500 g

c

1.5875 g

d

4825 g

answer is B.

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Detailed Solution

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Current (I) = 5 A and time (t) = 965 sec

We know that equivalent weight of copper 

               =Molecular weightValency=63.52

and quantity of electricity passed in coulomb =current×time=5×965=4825 C. Since 96500 coulombs will deposit 63.52g of copper, therefore 4825 coulombs will deposit 

              =63.5×482596500×2=1.5875g

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