in Environmental Issues by
recategorized by

1 Answer

0 votes

The Ozone layer present in the Stratosphere of the atmosphere forms a thick layer (16 - 40 km) and protects the life on earth against the ultraviolet radiations coming from the sun.

The Chlorofluorocarbons (CFC’s) that are widely used in coolants, air conditioners, refrigerators escape into the earth’s atmosphere as aerosols.

They dissociate to form Chlorine which acts on Ozone and reduces it.

The Chlorine and Chlorine free radicals are responsible for ozone hole over Antarctica.

Cl + O3 -----------> ClO  + O2

CFCl2, CF2Cl2 -----------> ClO + O2


Biology Questions and Answers for Grade 10, Grade 11 and Grade 12 students, Junior and Senior High Schools, Junior Colleges, Undergraduate biology programs and Medical Entrance exams.