The ozone layer protects the Earth from rays sent down by the Sun:

(A) Ultraviolet rays
(B) Infrared rays
(C) Gamma rays
(D) Radioactive rays

Q. What is the Chemical form of Ozone?
(A) O4
(B) O₃
(C) O2
(D) CO₃

Q. Ozone’s O₃ Structure was determined in:
(A) 1862
(B) 1863
(C) 1864
(D) 1865

Answers:
1. (A) Ultraviolet rays
2. (B) O₃
3. (D) 1865