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Question

From the following statements regarding H2O2 choose the incorrect statement:


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

The correct option is D It can only act as an oxidising agent
H2O2 acts as an oxidising as well as an reducing agent, because oxidation number of oxygen in H2O2 is 1. So, it can be oxidised to the oxidation state 0 or reduced to the oxidation state 2.

H2O2 acts as an oxidising agent
H2O2+Na2CO3Na2O2+H2O+CO2
H2O2 acts as an reducing agent
H2O2+SO2H2SO4

H2O2 decomposes on exposure to light. So, it has to be stored in plastic or wax linked glass bottles in the dark. It has to be kept away from dust.

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