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Question

The choking pungent odour, when methane reacts with chlorine in the presence of sunlight, is due to

A
chlorine
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B
hydrogen chloride
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C
chloro methane
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D
methane
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Solution

The correct option is B hydrogen chloride
The given reaction is an example of substitution reaction in which chlorine replaces hydrogen in methane to give chloromethane and hydrogen chloride gas. This reaction occurs in the presence of a sunlight. The pungent odour is due to hydrogen chloride gas.

CH4(g)+Cl2(g)CH3Cl(g)+HCl(g)

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