From the following statements regarding $\mathrm{H}_{2} \mathrm{O}_{2}$, choose the incorrect statement:

(D) It can act only as an oxidizing agent

(A) It decomposes on exposure to light

(B) It has to be stored in plastic or wax lined glass bottles in dark

(C) It has to be kept away from dust

JEE Main · 2015 · 04 Apr 2015 · Offline · Hydrogen

From the following statements regarding

H_{2} O_{2}

, choose the incorrect statement:

(A)It decomposes on exposure to light
(B)It has to be stored in plastic or wax lined glass bottles in dark
(C)It has to be kept away from dust
(D)It can act only as an oxidizing agent✓ Correct

Answer: (D)

Solution

The claim to reject is that

H_{2} O_{2}

can act only as an oxidising agent. In truth it plays both parts: it oxidises when it is reduced to water, and it reduces when it is oxidised to

O_{2}

, the direction set by its partner. The other statements are sound -- it does decompose in light and on contact with dust, so it is kept in dark, wax-lined or plastic bottles -- which leaves the 'only oxidising' statement as the incorrect one.

JEE Main · 2015 · 04 Apr 2015 · Offline · Single correct option

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