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Q.

Weight of copper (atomic mass 63.5) deposited  when 2 Faradays of electricity is passed  through cupric salt solution is

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a

63.5g.

b

31.15g.

c

127g.

d

 2g.

answer is A.

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Detailed Solution

1 F deposits 1 eq of any substance.

2 F deposits 2 eq.

 1 eq of Cu =32.75 gm

2  eq of Cu = 2 x 32.75 =63.5 gm.

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