Ecology And Environment Ques 114

Question: Atmosphere contains 21 % of which gas?
  1. Nitrogen
  2. Oxygen
  3. Phosphorous

Options:

A) 1 only

B) 2 only

C) 3 only

D) None of the Above

Show Answer

Answer:

Correct Answer: B

Solution:

  • Atmosphere contains 21% of Oxygen.