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Question

can slow down the decomposition of hydrogen peroxide.

A
Sunlight
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B
Urea
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C
Dust
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Solution

The correct option is B Urea
H2O2 decomposes on exposure to sunlight or on heating.
It also decomposes on standing but at a slow rate.
This reactions occurs explosively when H2O2 is in contact with dust.
Urea acts as a negative catalyst to this reaction and slow down the decomposition of hydrogen peroxide.

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