Multiple choice

Which of the following gases is present in the highest amount in the air?

  1. Carbon dioxide

  2. Hydrogen

  3. Nitrogen

  4. Oxygen

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Nitrogen is present in the highest amount in the air. Nitrogen (N2): 78.09% Oxygen (O2): 20.95% Argon (Ar): 0.93% Carbon dioxide (CO2): 0.038%