Question

In the electrolysis of alkaline water, a total of 1 mol of gases is evolved. The amount of water decomposed would be:

• A. 1 mole
• B. 2 moles
• C. 1/3 mole
• D. 2/3 mole

Answer 1

The correct option is D 2/3 mole

In the electrolysis of alkaline water,

$2H_{2}O\rightleftharpoons$ $2H_2$+ $O_2$

3 moles of gases are produced from 2 moles of water.

$\therefore$ 1 mole of gases will be produced from $\frac{2}{3}$ moles of water.

Therefore, the answer is 2/3 mole.

Hence, option $D$ is correct.