Question 6

Which are the correct statements related to ozone?
(i) Ozone layer helps in increasing the UV radiations reaching earth.
(ii) Ozone is a deadly poison.
(iii) Ozone layer shields the earth from UV radiations.
(iv) Ozone layer prevents UV rays which cause skin cancer.
(v) Ozone is formed with the help of Chloroflurocarbons.
A. (i), (ii), (iii)
B. (ii), (iii), (iv)
C. (iii), (iv), (v)
D. (i), (iv), (v)

 

Answer:

B. (ii), (iii), (iv)

Statements given:

(i) Ozone layer helps in increasing the UV radiations reaching earth.
→ ❌ Wrong. Ozone reduces UV radiation, it does not increase it.

(ii) Ozone is a deadly poison.
→ ✅ True. At ground level, ozone is toxic and harmful to living beings.

(iii) Ozone layer shields the earth from UV radiations.
→ ✅ Correct. This is its protective role in the stratosphere.

(iv) Ozone layer prevents UV rays which cause skin cancer.
→ ✅ Correct. By blocking harmful UV-B rays.

(v) Ozone is formed with the help of Chlorofluorocarbons (CFCs).
→ ❌ Wrong. CFCs do not form ozone, they actually deplete ozone by releasing chlorine radicals.