Question

The quantity of electricity required to libreate 112 cm3 of hydrogen at STP from acidified water is

• A. 965 Coulmbos
• B. 1 Faraday
• C. 22.65 Faraday
• D. 96500 Coulmbos

Answer 1

The correct option is A 965 Coulmbos

Given : The quantity of electricity required to libreate 112 cm3 of hydrogen at STP from acidified water is

Solution :

$2H+2e^{-}=H_2$

2 F is required to liberate 22.4 L of $H_2$ gas (1F = 96500 C)

1000cc = 1L

112cc = 0.112 L

So current required for 0.112 L is $\frac{193000\times 0.112}{22.4}$ = 965 C

The Correct Opt = A