Home: Chemistry MCQs
Q. The major component of troposphere is
(A) Argon
(B) Carbon
(C) Hydrogen
(D) Nitrogen
The answer is: (D) Nitrogen ☑
Q. Ozone depletion causes
(A) Blood Cancer
(B) Skin Cancer
(C) Malaria
(D) T.B
The answer is: (B) Skin Cancer ☑
Q. The pH of the acid rains is less than
(A) 5.6
(B) 5.1
(C) 4.6
(D) 4.1
The answer is: (A) 5.6 ☑
Q. Ozone is a ____________ gas.
(A) Reddish
(B) Greenish
(C) Bluish
(D) Yellowish
The answer is: (C) Bluish ☑
Q. In water, ratio of oxygen and hydrogen by mass is
(A) 1:3
(B) 2:1
(C) 1:2
(D) 8:1
The answer is: (D) 8:1 ☑