Question

Which is the correct combination of products collected over anode and cathode respectively in order to prepare hydrogen by electrolysis of water?

• A. $O_2,H_2$
• B. $H_2,O_2$
• C. $Na,O_2$
• D. $O_2,Na$

Answer 1

The correct option is A $O_2,H_2$

Electrolysis of water is the decomposition of water $\left(H_{2}O\right)$ into oxygen$\left(O_2\right)$ and hydrogen gas $\left(H_2\right)$ due to an electric current being passed through the water.