MHT CET · Chemistry · Environmental Chemistry

Which among the following statements about ozone depletion is NOT true?

A Depletion of ozone is most pronounced over Antarctica.
B Freons used in aerosol that enters into atmosphere causes depletion of ozone layer.
C Nitrogen oxide released from cars causes ozone depletion.
D Due to ozone depletion less amount of UV radiations reaches to earth surface.

Verified Solution

Answer & Solution

Correct Answer

(D) Due to ozone depletion less amount of UV radiations reaches to earth surface.

Step-by-step Solution

Detailed explanation

The ozone layer is mainly found in the lower portion of the earth's atmosphere. It has the potential to absorb around \(97-99 \%\) of the harmful ultraviolet radiations coming from the sun that can damage life on earth. If the ozone layer was absent, millions of people would develop skin diseases and may have weakened immune systems.
Due to ozone depletion high amount of UV radiations reaches to earth surface

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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