‘Safe limit’ called Threshold Limit Value (TLV) of carbon monoxide in atmospheric air is < 50 ppm. The main source of carbon monoxide pollutant in air is the

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Question: ‘Safe limit’ called Threshold Limit Value (TLV) of carbon monoxide in atmospheric air is < 50 ppm. The main source of carbon monoxide pollutant in air is the
[A].

industrial chimney exhaust.

[B].

automobiles exhaust.

[C].

photochemical reaction in polluted atmosphere.

[D].

burning of domestic fuel.

Answer: Option B

Explanation:

No answer description available for this question.