Statement 1: Ozone hole is the thinning of ozone layer.
Statement 2: Ozone is a poisonous gas that leads thinning of the atmosphere.

Options

A. Both statements 1 and 2 are correct.
B. Statement 1 is correct but statement 2 is incorrect.
C. Statement 1 is incorrect but statement 2 is correct.
D. Both statements 1 and 2 are incorrect.

Answer

B

Explanation

Ozone is poisonous and we are lucky that it is not stable nearer to the earth.s surface. But it performs an essential function where it is found. It absorbs harmful UV radiations from the sun. This prevents those harmful radiations from reaching the surface of the earth where they may damage many forms of life. Ozone layer is getting depleted due to use of various man-made compounds like CFCs having both fluorine and chlorine which are very stable and not degraded by any biological processes. Once they reach the ozone layer, they would react with the ozone molecules. This has resulted in a reduction of the ozone layer.