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Question : Assertion : Photochemical smog is mainly composed of nitrogen oxides, volatile organic compounds, ozone and peroxyacyl nitrates. Reason : Photochemical smog develops in cold weather conditions by the interaction of secondary pollutants.

Answer»

(a) Both, Assertion and Reason, are true and Reason is the correct explanation of Assertion
(b) Both, Assertion and Reason, are true but Reason is not the correct explanation of Assertion
(c) If Assertion is true but Reason is false
(d) If Assertion is false but Reason is true

Solution :Photochemical smog is a condition that develops when primary pollutants (such as oxides of nitrogen and volatile ORGANIC compounds) interact under the influence of SUNLIGHT to PRODUCE a MIXTURE of secondary pollutants. Thus photochemical smog is mainly composed of oxides of nitrogen volatile organic compounds (primary pollutants), ozone and peroxyacl nitrate, PAN (secondary pollutants).


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