Question

Identify the incorrect statement from the following:

• A. Ozone absorbs the intense ultraviolet radiation of the sun.
• B. Depletion of ozone layer is because of its chemical reactions with chlorofluoro alkanes.
• C. Ozone absorbs infrared radiation.
• D. Oxides of nitrogen in the atmosphere can

Answer 1

Answer: (C)

The ozone layer, existing between $20$ to $35 \,km$ above the earth's surface, shield the earth from the harmful U. V. radiations from the sun.
Depletion of ozone is caused by oxides of nitrogen
$N _{2} O + hv \longrightarrow \underset{\text { reactive nitric oxide }}{ NO }+ N$
$ NO + O _{3} \longrightarrow NO _{2}+ O _{2}$
$ O _{3}+ hv \longrightarrow O _{2}+ O $
$ NO _{2}+ O \longrightarrow NO + O _{2} $
$2 O _{3}+ hv \longrightarrow 3 O _{2} $ (Net reaction)
The presence of oxides of nitrogen increase the decomposition of $O _{3}$.