Question

Which of the following are NOT the properties of air? *

a. Air occupies space.
B. Air has mass
c. Air does not exert pressure.
d. All of these

Answer 1

Answer:

option D All of these is the correct answer

Answer 2

The correct Option is "C". Air does not exert pressure. Air not only possesses mass, but it also exerts pressure. The force exerted by air particles pushing in all directions is known as air pressure.

Explanation: While air pressure can refer to the pressure of air within a limited space, atmospheric pressure refers to the pressure exerted by air molecules above a certain point in the Earth's atmosphere.

• Due to the weight of air particles above, the atmospheric pressure rises as we travel closer to the Earth.
• This is why air pressure is lower at the top of a mountain than it is at sea level. The weight of air above compresses the air particles at the Earth's surface, resulting in a higher particle density.
• A barometer is a device that measures atmospheric pressure.
• The air pressure inside a tyre, a football, or an air mattress cannot be measured using a barometer.