JEE Main 2004 Chemistry question

The smog is essentially caused by the presence of

(1) and
(2) and
(3)Oxides of sulphur and nitrogenCorrect
(4) and

Answer: (3)

Solution

Smog results from pollutant oxides: classical (London) smog involves sulphur dioxide with smoke and fog, while photochemical smog involves nitrogen oxides with

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Question ID VK-038402