Which of the following is true about air?

Air is a mixture of several gases.

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Air exerts pressure.

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Composition of air is uniform.

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Air has mass.

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Solution

The correct options are
A Air is a mixture of several gases.
B Air exerts pressure.
D Air has mass.
Air is a mixture of many gases, water vapour and dust particles. It has mass and can exert pressure.
The composition of air is not uniform and changes from place to place. Polluted air contains higher percentage of gas like carbon dioxide as compared to less polluted areas.

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Similar questions

Which of the following is true about air?
(i) Air is a mixture of several gases.
(ii) Air exerts pressure.
(iii) The composition of air is uniform in all places.

Q. Which of these statements are true about air?
(i) Air is a mixture of several types of gases.
(ii) Air exerts pressure.
(iii) The composition of air is constant in the atmosphere.

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Statement III: Air is composed of two gases, nitrogen and oxygen only.

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