Ozone layer is getting depleted because of ……… 

B) Stratosphere

B) It protects living organisms from ultraviolet – B radiation from the Sun.

Correct Answer - `(i) 1/6 (ii) 1/3 (iii) 1/2 (iv) 1/2 (v) 1/3 (vi) 1/3`

Correct Answer - `(i) 5/18 (ii) 1/12 (iii) 5/12`

B) Ultraviolet rays

C) Chlorofluoro carbons

B) Montreal protocol

(D) X-rays and ultraviolet rays.

C) Both (i) & (iv)

(b) Stratosphere