During electrolysis; 2.0 g of a metal is deposited using a current of 0.5 A in 3 hours. The mass of the same metal which can be deposited using a current of 1.5 A in 1 hour is?

A. 1.0 g
B. 0.5 g
C. 3.0 g
D. 2.0 g

Correct Answer:

Option D = 2.0 g

Explanation

M = Itz; z = (M)/It = (2)/0.5 x 3 x 60 x 60
= 3.703 x 10^-4 gc^-1
∴ M = Itz = 1.5 x 1 x 60 x 60 x 3.703 x 10^-4
= 1.99962g.
=2.0g