Question

Ultraviolet radiation from sunlight cause the reaction that produce

• A. Carbon monoxide
• B. Sulphur dioxide
• C. Ozone
• D. Fluoride

Answer 1

The correct option is C Ozone

Ozone occurs in concentration of up to 1 ppm in stratosphere as compared to 0.5 ppm in troposphere. Ozone is formed in the stratosphere from oxygen due to solar radiations. Maximum ozone concentration is found at a distance of 23 to 25 km above equator and 11 to 16 kms over poles. It is called ozone layer or ozonosphere.

Ozone protects earth by filtering out ultra-violet radiations. In the upper reaches of atmosphere ultraviolet radiations split oxygen molecule into singlet or reactive oxygen. Each singlet or reactive oxygen reacts with another molecule of oxygen to form a molecule of ozone and another singlet or reactive oxygen and the chain reaction continues. The ozone molecule is regularly been produced as well as degraded back into oxygen through dynamic chain reactions.