Decomposition of hydrogen peroxide can be prevented by adding

• Correct answer
  A

  urea
• B

  $\mathrm{MnO}_2$
• C

  oxalic acid
• D

  NaOH

Solution

$\mathrm{H}_2 \mathrm{O}_2$ decompose on exposure to light $2 \mathrm{H}_2 \mathrm{O}_2 \longrightarrow 2 \mathrm{H}_2 \mathrm{O}+\mathrm{O}_2$ Thus, its decomposition can be prevented by adding urea as a stabiliser.

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