Q1: Write the unit of pressure?

Ans. Newton per square metre.

Q2: Do liquids also exert pressure?

Ans. Yes, liquids also exert pressure. When a liquid is put in a vessel it exerts pressure on its bottom and wall.

Q3: What is gas pressure?

Ans. The outward force per unit area of the walls is called gas pressure.

Q4: What is atmospheric pressure?

Ans. The pressure exerted by the atmospheric air is known as atmospheric pressure.