Which of the following can reduce decomposition of $\mathrm{H}_{2} \mathrm{O}_{2}$ on exposure to light

JEE Main · 2023 · 08 Apr 2023 · Shift 2 · Hydrogen

Which of the following can reduce decomposition of

H_{2} O_{2}

on exposure to light

(A)Alkali
(B)Urea✓ Correct
(C)Dust
(D)Glass containers

Answer: (B)

Solution

Hydrogen peroxide slowly decomposes into water and oxygen, and this is speeded up by light, dust, rough surfaces and traces of alkali. To check this a stabiliser such as urea is added, which suppresses the decomposition and improves the keeping quality of the solution. Alkali and dust promote decomposition, and ordinary glass does not stop the light-induced reaction. The substance that reduces the decomposition is urea.

JEE Main · 2023 · 08 Apr 2023 · Shift 2 · Single correct option

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