MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Inorganic ChemistryEnvironmental ChemistryPrevious Year Questions

Photochemical smog is caused due to the presence of (Kerala CEE2009)

A.oxides of sulphur

B.oxides of nitrogen✓ Correct

C.oxides of carbon

D.lead

Explanation

Photochemical smog (or Los Angeles smog) is formed by the action of sunlight on unsaturated hydrocarbons and oxides of nitrogen are present in the atmosphere. Due to the presence of oxides of nitrogen and ozone, it is oxidising in nature.

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