Question

Which of the following statements is correct?
1. For water at 100°C at sea level, the vapour pressure is equal to the atmospheric pressure. 
2. Air is 50,000 times more compressible than water
3. Viscosity of the molecules is the property exhibited by them in both static and dynamic conditions
4. Surface energy is caused by the force of adhesion between liquid molecules

Answer 1

Correct Answer - Option 1 : For water at 100°C at sea level, the vapour pressure is equal to the atmospheric pressure. 

Explanation:

Different types of properties of the fluid are mention below;

• Vapour pressure of fluid depends on Temperature. i.e. Vapour pressure of water at 100°c is 760 mmHg(1 atm).

• When the two adjacent layers of fluid are in relative motion then they resist the motion of each other such a fundamental property of the fluid is known as viscosity.
• Air is 20000 times more compressible than water. Water can be treated as incompressible.
• The attractive force between molecules of the same type is called cohesive force.
• The attractive force between molecules of different types is called adhesive force.