NEET levelSingle correct optionDifficulty 1 of 3ev058
Which class of compounds is chiefly responsible for the depletion of the stratospheric ozone layer?
AOxides of sulphur
BCarbon monoxide and carbon dioxide
CPolycyclic aromatic hydrocarbons
DChlorofluorocarbons
Answer: D
Chlorofluorocarbons are inert in the troposphere, drift into the stratosphere and there release chlorine atoms under UV light. These atoms catalytically destroy ozone.