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The breakdown...

Question

The breakdown of CFCs in the presence of UV rays produce _______, which is the main cause for depletion of ozone layer.

A

Carbon

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B

Hydrogen

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C

Oxygen

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D

Chlorine

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Solution

The correct option is D
Chlorine

The chlorofluro carbons are decomposed by the ultraviolet rays to highly reactive chlorine which is produced in the atomic form.

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Q. Assertion (A) : Ozone depletion leads to global warming.
Reason (R) : UV rays cause destruction of the ozone layer.

Q. Ozone layer depletion is caused by
(a) PAN
(b) CO₂
(c) CFCs
(d) coal burning

Q. Assertion: Global warming is resulting in ozone layer depletion.

Reason: UV rays cause photodissociation of ozone to oxygen.

Q. Read the following statements (A - D) related to the depletion of the ozone layer by CFCs and select the correct option stating true (T) and false (F).

A. CFCs are the most damaging agents of the ozone layer.
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1. The ozone hole is measured in terms of ozone concentrations, which is expressed in Dobson units.
2. The major cause for ozone depletion is the presence of CFCs in the stratosphere - CFCs are entirely man-made and not found naturally.

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