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
Verified Correct Answer: D.
Physical Principles & Numerical Solution
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
Source: Myschool Past Questions Archive (Record #13866)