Question

Which of the following statements about the depletion of ozone layer is correct?

• A. Oxides of nitrogen also do not react with ozone in stratosphere.
• B. The problem of ozone depletion is less serious at poles because $N{O}_2$ solidifies and is not available for consuming $ClO$ radicals.
• C. The problem of ozone depletion is more serious at poles because ice crystals in the clouds over poles act as catalyst for photochemical reactions involving the decomposition of ozone by $Cl$ and $ClO$ radicals.
• D. Freons, chlorofluorocarbons, are inert chemically, they do not react with ozone in stratosphere.

Answer 1

Answer: (C)

The problem of ozone depletion is more serious at poles because ice crystals in the clouds over poles act as catalyst for photochemical reactions involving the decomposition of ozone by $Cl$ and $ClO$ radicals.

Solution

When these chemical reactions combine with certain weather conditions like prolonged cold and ice on clouds , the cause more harm to ozone layers and form ozone holes on poles easily.

The correct option is C