With the depletion of the ozone layer, UV radiations lead to ageing of the skin, cataracts, sunburn, skin cancer, killing of many phytoplanktons, damage to productivity etc.
Important Questions on Redox Reactions
Which of the following statements are correct related to ozone depletion in the stratosphere?
(i) Ozone found in the upper part of the atmosphere that act as an efficient shield by absorbing UV rays from the Sun
(ii) DNA and proteins of living organisms could not absorb UV rays
(iii) Ozone gas is continuously formed by the action of UV rays on molecular oxygen
(iv) Ozone gas is more stable
(v) atoms are related from CFC by the action of UV rays, these atoms act as catalyst to degrade, ozone molecules
Match the following related to effect of UV rays on organisms?
| List I | List II | ||
| (i) | UV Light | (a) | |
| (ii) | UVC Light | (b) | |
| (iii) | UVB Light | (c) | |
| (iv) | UVA Light | (d) | |
The following question has four choices. Choose the best option.
Montreal protocol aims at
Write short notes on :
Ozone layer depletion
Match the entries in columns I and II and choose the correct pairs from the choices below.
| Column I | Column II | ||
| A | High | Skin cancer | |
| B | Ozone hole | Greenhouse gas | |
| C | Nino effect | Food chain | |
| D | Biomagnification | Water pollution |
