A charge of one coulomb liberates 0.0033g of copper in an electrolytic process. How long will it take a current of 2A to librate 1.98g of copper in such a process?
A
5 mins
B
30 mins
C
50 mins
D
60 mins
E
120 mins
Verified Correct Answer: A.
Physical Principles & Numerical Solution
0.0033g = 1 coulomb
1.98gs = 1.98 x 1
= 600 cou.
Q = It
600 = 2 x t
t = 300sec = 5 mins
Source: Myschool Past Questions Archive (Record #28636)