1.

Polar cloud in stratosphere helps in the formation of which molecule (1) ClO (2) ClONO2 (3) CH4 (4) HOCl

Answer»

Correct option is (1) ClO

Polar stratospheric clouds (PSCs) surfaces act as catalysts that convert more benign forms of human made chlorine into active free radicals (for example CIO, chlorine monoxide). During the return of spring sunlight these radicals destroy many ozone molecules in a series of chain reactions.



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