Question

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

• A. Cl
• B. Fe
• C. Oxygen
• D. Carbon

Answer 1

The correct option is A

Cl

Explanation for Correct Answer:

Correct Option: (A) Cl

• The ozone layer is present in the stratosphere that inhibits the harmful ultra-violet rays to pass through it completely and reach the earth's surface.
• The ozone layer is made up of a thin blanket of ozone gas.
• Ozone gas consists of 3 oxygen molecules bonded to each other and has a bent structure.

• In the stratosphere, ozone molecule reacts with chlorine-free radical to form hypochlorite and oxygen molecules.
• Hence it is the correct option.

Incorrect Option: (B) Fe

• Fe is a heavy metal and can never be found as a gaseous form in the earth's atmosphere.
• Hence it is the incorrect option.

Incorrect option: (C) Oxygen

• Oxygen does not react with ozone in the upper stratosphere.
• Hence it is the incorrect option.

Incorrect option: (D) Carbon

• The carbon percentage is very low in the upper stratosphere. Carbon dioxide is already a stable molecule and thus it does not react with the ozone layer.
• Hence it is the incorrect option.

Final Answer:

• Therefore, the correct option is (A) Cl