Question

Which of the following option shows the correct percentage composition of the component of air?

• A. Nitrogen - 69.5 %
• B. Oxygen - 20.9%
• C. Carbon dioxide - 0.04%
• D. Argon - 2%

Answer 1

The correct option is B

Oxygen - 20.9%

Air is very important for human survival. It consists of various gases. Air consists of 78% of nitrogen gas. Therefore, nitrogen is the most abundant gas present in the air. Air consists of 20.9% of oxygen gas which is very important for the survival of plants and animals. Air consists 0.04% of carbon dioxide gas which also plays an important role in the survival of plants. Other gases constitute 1% of the composition of air in which argon constitutes 0.93% of air.