Answer:
(c) Two types of compounds have
been found to be the most responsible for depleting the ozone layer. These are
:
(i) NO and (ii)
chlorofluorocarbons.
\[NO+{{O}_{3}}\xrightarrow{{}}N{{O}_{2}}+{{O}_{2}}\]
\[C{{F}_{2}}C{{l}_{2}}\xrightarrow{hv}{{\,}^{\centerdot
}}C{{F}_{2}}Cl+{{\,}^{\centerdot }}Cl\]
\[{{\,}^{\centerdot
}}Cl+{{O}_{3}}\xrightarrow{{}}Cl{{O}^{\centerdot }}+{{O}_{2}}\]
\[Cl{{O}^{\centerdot
}}+O\xrightarrow{{}}C{{l}^{\centerdot }}+{{O}_{2}}\]
These reactions occur in
stratosphere.
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