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A certaom cirrent liberates 0.504 g of h...

A certaom cirrent liberates 0.504 g of hydrogen in 2 hr. How many gram of copper can be liberated by the same current flowing for the same time in `CuSO_4` solution:

A

`12.7`

B

16

C

`31.8`

D

`63.5`

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The correct Answer is:
B
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