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Question:

In stratosphere, which of the following elements acts as a catalyst in degradation of ozone and release of molecular oxygen?

Fe

Carbon

Oxygen

Cl

Solution:

Chlorine acts as a catalyst in the degradation of ozone and the release of molecular oxygen. The reaction occurs as follows: Cl + O3 → ClO ClO + O3 → Cl + 2O2 So, the correct answer is option D.