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प्रश्न
Air is a mixture of various gases. One of the gas is 21% part of the air and is essential for the survival of human beings. This gas is
विकल्प
nitrogen
oxygen
ozone
argon
उत्तर
oxygen
Explanation -
Oxygen makes up about 21% of air by volume. It is essential for the survival of human beings.
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संबंधित प्रश्न
Define the following term: Pollution
What is air pollution?
What are the types of pollution?
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CFC
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AQI
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Name any two sources which causes air pollution due to Suspended Particulate Matter (SPM).
The level of air pollution is higher at a busy traffic intersection. Why?
Find out the wrong statement and write it in its correct form.
We can survive for sometime without air but we cannot survive even for a few minutes without food.
The chief gaseous air pollutants are CO2 and SO2.
