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Chemistry Question on Polarity of bonds

Polar stratospheric clouds facilitate the formation of:

A

CIONO2CIONO_2

B

HOCLHOCL

C

CIOCIO

D

CH4CH_4

Answer

HOCLHOCL

Explanation

Solution

In summer season nitrogen dioxide and methane react with chlorine monoxide and chlorine atoms forming, Chlorine sinks, preventing much ozone depletion, whereas in winter, special types of clouds called polar stratospheric clouds are formed over Antarctica. These polar stratospheric clouds provide surface on which chlorine nitrate formed gets hydrolysed to form hypochlorous acid.
CIO(g)+NO2(g)→CIONO2(g)CIO_{(g)}+{NO_2}_{(g)}→{CIONO_2}_{(g)}
ClONO2(g)+H2O(g)→HOCl(g)+HNO3(g){ClONO_2}_{(g)} + H_2O_{(g)} →HOCl_{(g)} + {HNO_3}_{(g)}