Question

The same amount of electric current is passed through solutions of $AgN{O}_3$ and $HCl$. If $1.08g$ of silver is obtained in the first case, the volume of hydrogen liberated at $S.T.P$ in the second case is:

• A. $112$ $c{m}^3$
• B. $22400$ $c{m}^3$
• C. $224$ $c{m}^3$
• D. $1.008$ $g$

Answer 1

Answer: (A)

$112$ $c{m}^3$

Number of equivalent for $Ag$ $=\left(\frac{1.08}{108}\right)=0.01eq$

Since 1 eq. produces $11.2$ litre of $H_2$ at $STP$

So $0.01$ eq. produces $(11.2\times 0.01)$ litre of $H_2$

Or vol$=0.112$ litre

$=112c{m}^3$