Q. A certain current liberated 0.504 g of hydrogen in 2 h. How many grams of copper can be liberated by the same current flowing for the same time in a copper sulphate solution?
A) 12.9 g
B) 15.9 g
C) 31.7 g
D) 36.9 g
Explanation
(b)
$\frac{Weight\ of\ Cu}{Weight\ of\ H_{2}} = \frac{Eq.wt.of\ Cu}{Eq.wt.of\ H_{2}}$
$\frac{Weight\ of\ Cu}{0.504} = \frac{63.6/2}{1}$
$\therefore\$Weight of Cu$\ = 15.9\ g$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.