Multiple choice

Air is a mixture of gases. Which of the following are its two major components?

a. Oxygen b. Carbon dioxide c. Nitrogen d. Helium

  1. Only a and b

  2. Only a and d

  3. Only a and c

  4. Only b and c

  5. Only b and d

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

This is the correct option. Oxygen constitutes 1/5th part of air and nitrogen constitutes 4/5th part of air.