Assertion (A): UV radiation causes photodissociation of ozone into `O_(2)` and O, thus causing damage to the stratospheric change.
Reason (R): Ozone hole is resulting in global warming and climate change.

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion.
B. It both Assertion & Reason are true but the reason is not the correct explanation of the assertion.
C. If Assertion is true statement but Reason is false.
D. It both Assertion and Reason are false statements.

Answer

a

Explanation

stratosphere zone of earth's atmosphere contians a layer of ozone `(O_(3))` which prevents the earth surface from about`99%` of incoming solar ultra violet radiations. The primary chemicals responsible for ozone depletion are a group of chlorine containing compounds called chloroflourocarbons (CFCs) used as coolants in refrigerators and air conditionrs and propellants for aerosol cans and foam blowing agents for insulation and packaging and also as solvenis. After startosphere when these are broken down by ultraviolet radiations releasing chlorine or bromine which break `O_(3)` molecules into `O_(2) and O`. Due to rays reach earth surface. Depletion in the concentration of ozon over a restricted area is called ozon hole. Ozone depletion sresults in becoming blind, mutations, depletions result in becoming blind skin cancer, cataract animals photosynthesis, decreases in productivity. Decreased photosynthetic activity will increases `O_(2)` concentration of the atmosphere resulting in global warming.