Question

Ozone depletion is caused by only nitric oxide - True or False?

• A. True
• B. False

Answer 1

The correct option is B False

Nitric oxide causes ozone depletion, as shown below:
$NO\left(g\right)+O_3\left(g\right)\to N{O}_2\left(g\right)+O_2\left(g\right)$

Effect of CFC’s (Chloro Fluoro Carbons) on ozone layer
$C{F}_{2}C{l}_2\stackrel{hv}{\to }C{l}^{\cdot }{+}^{\cdot }C{F}_{2}ClC{l}^{\cdot }+O_3\left(g\right)\to Cl{O}^{\cdot }+O_2\left(g\right)$

Thus nitric oxide is major cause for ozone depletion although it is not the only cause.