MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Inorganic ChemistryEnvironmental ChemistryO3, NO2 acrolein, formaldehyde and PAN
Which of the following statement(s) is/are true? I. Carbon monoxide is a secondary air pollutant II. SO2 causes brown air effect during traffic congestion in cities. III. DDT is a non-biodegradable pollutant.
A.I and II
B.II and III
C.Only III✓ Correct
D.I, II and III
Explanation
DDT is a non-biodegradable pollutant
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