Q21Short answer
On the basis of chemical reactions involved, explain how do chlorofluorocarbons cause thinning of ozone layer in stratosphere.
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CFC’s are stable compounds. These undergo decomposition in presence of sunlight, as shown below : Reactions: CF2Cl2 (g) ⎯⎯⎯ → Cl (g) + CF2Cl (g) Cl (g) + O3 (g) ClO (g) + O2 (g) ClO (g) + O (g) Cl (g) + O2 (g) Chain reactions continue in which ozone layer is depleted.