About ----------of air contain oxygen

Options :
  1. 2/3
  2. 1/5
  3. 2/5
  4. 1/4
Answer and Explanation :-

Answer: Option 2

Explanation:

Sorry there is no explanation for this answer. Please help others by posting your response below

How do you rate this queston?  Very Easy  Easy  Average  Above Average  Tough

Previous Question : With increase in the moisture in air, atmospheric pressure

Next Question : When air is cooled, carbondioxide separeates as dry ice at

Click here for online test on General Science

Responses


 (Getemail alerts when others member replies)







Small mistakes tend to lead to large ones. Ours is a lifetime appoinment, and all you have is your reputation. Once it's gone, it doesn't comeback.
-David Baldacci The Simple Truth