What is the gas liberated when alkaline formaldehyde solution is treated with $\mathrm{H}_2 \mathrm{O}_2$ ?

• A

  $\mathrm{CO}_2$
• B

  $\mathrm{O}_2$
• C

  $\mathrm{CH}$
• Correct answer
  D

  $\mathrm{H}_2$

Solution

Alkaline formaldehyde solution reacts with $\mathrm{H}_2 \mathrm{O}_2$ as follows.

Hence, the correct answer is option: 'D'.