Correct Answer : C
The most permanent element of the atmosphere is
(A) Nitrogen
(B) Water vapor
(C) oxygen
(D) None of these
What percentage of the earth's atmosphere is found up to a height of 29 km?
(A) 30%
(B) 65%
(C) 88%
(D) 97%
Which gas in the atmosphere protects us from scorching sun's strong rays?
(A) Argon
(B) Ozone
(C) oxygen
(D) Hydrogen
Which of the following is called the safety valve of nature?
(A) Volcano
(B) Ozone gas
(C) Earthquake
(D) Rivers
Which one of the following is a mountain of Valit?
(A) Nilgiri
(B) Himalaya
(C) Satpura
(D) None of these