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Question

Ansil's alarm is used to detect which gas in mines?

A
CO2
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B
CO
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C
CH4
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D
COCl2
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Solution

The correct option is B CH4
Ansil alarm works on the principle of diffusion property of gases. It is used in coal mines for the detection of marsh gas (CH4). Methane has low molecular weight and hence it diffuses faster.

Hence, the correct answer is option C.

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