2. Questions Bank
  3. UPSC
  4. Ecology And Environment
  5. Ecology and Environment

UPSC Ecology And Environment Ecology and Environment Question Bank Ecology And Environment

  • question_answer
    Atmosphere contains 21 % of which gas?
    1.  Nitrogen
    2. Oxygen
    3. Phosphorous

    A) 1 only             

    B) 2 only

    C) 3 only         

    D) None of the Above

    Correct Answer: B

    Solution :

    Atmosphere contains 21% of Oxygen.


You need to login to perform this action.
You will be redirected in 3 sec spinner