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Q.

A solution of copper sulphate (CuSO4) is electrolysed for 10 minutes with a current of 1.5 amperes. The mass of copper deposited at the cathode (at. mass of Cu = 63u) is

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a

0.3892 g

b

0.2938 g

c

0.2398 g

d

0.3928 g

answer is B.

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Detailed Solution

W = Zit
where Z = Electrochemical equivalent
Eq. wt. of copper = =632=31.5
Z=31.596500
W=Zit=31.596500×1.5×10×60=0.2938g

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