Question

How much electricity must pass through acidulated water to release $22,400c{m}^3$ of hydrogen at N.T.P.?

• A. 96500 C
• B. 193000 C
• C. 22.4 C
• D. 95.5 C

Answer 1

The correct option is B 193000 C

We know that $22,400c{m}^3$ of $H_2$ means $1$ mole of $H_2$.

Now, we know that $2H^{+}+2e^{-}\to H_2$

Hence, for production of 1 mole of $H_2$, two moles of $e^{-}$ are required.

And, one mole of $e^{-}$ constitutes $96500C$

Hence, charge or electricity required$=96500\times 2=193000C$

Answer-(B)