The oxygen content in inspired air is

Question

Question

This question was previously asked in

Bihar Police Constable Memory Based Paper (Held On: 1st October 2023 Shift 1)

Answer 1

The correct answer is 21%

Key Points

Oxygen

Nitrogen gas contributes the maximum amount to the atmospheric gases, the rest of the gases occupy a minimal amount of the atmosphere which is less than 1%.
The second most abundant gas in the atmosphere is oxygen.
Oxygen is present in 21% of the atmosphere.
Along with air, it holds many tiny dust particles called aerosols.
Air carrying a large amount of these particles is termed air pollution and forms soot in the atmosphere.
The major source of oxygen in the atmosphere is trees, tiny ocean plants called phytoplankton, and some bacteria.
Phytoplankton lives under the water where they use sunlight and carbon dioxide to make food and release oxygen as a by-product.
Oxygen is present in two forms- oxygen O2 and ozone O3.
Ozone is the upper layer of the atmosphere that protects us from the harmful radiation of the sun.
Aloe vera is a plant that releases oxygen at night and that purifies the air also removing toxins like aldehyde and benzene.