Question

Ozone layer present in the atmosphere protects life on earth by not permitting harmful radiations present in the sunlight to penetrate through it. Ozone layer is formed by the reaction of
1. Chlorofluorocarbons (CFCs) on oxygen (O₂)
2. Chlorine (Cl) on oxygen (O2)
3. Solar Ultraviolet rays on oxygen (O2)
4. Chlorine nitrate (CINO₃) on oxygen (O2)

Answer 1

Correct Answer - Option 3 : Solar Ultraviolet rays on oxygen (O2)

• Ozone is mainly formed by the chemical reaction between the oxygen molecules and the UV Rays of the sunlight.
• The Ozone layer is mainly present in the Stratosphere of the atmosphere and it absorbs most of the UV rays of the sun.
• The rise in the temperature in the stratosphere is caused by the absorption of Ultraviolet radiations
• The ozone is capable of absorbing radiations from the Sun and this causes an increase in temperature towards the upper part of the stratosphere while the lower part shows less temperature; this is called temperature inversion.
• Ozone layer protects life on earth by not permitting harmful radiations present in the sunlight to penetrate through it.