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

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Carbon

Oxygen

answer is B.

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Detailed Solution

In stratosphere, Cl acts as a catalyst in the degradation of ozone. In the stratosphere, ozone is constantly
being formed and destroyed through a natural cycle. Chlorine (Cl) atoms are primarily responsible for the destruction of ozone in the stratosphere. When a Cl atom encounters an ozone molecule, it removes
an oxygen atom from the ozone molecule and forms a chlorine monoxide molecule (ClO) and an oxygen molecule (O2). The ClO molecule can then react with a free oxygen atom to form a chlorine atom and
an oxygen molecule. The chlorine atom can then go on to react with more ozone, and the cycle continues.
Question Image
(1) Free carbon is not involved in the destruction of ozone.
(4) Oxygen contributes to the formation of ozone, not destruction.
(3) Fe (iron) is a metal and it is not typically present in the stratosphere.

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