Assertion :The contact angle between water and glass is acute.
Reason :The surface of water in the capillary is convex .

Define capillary water.

If the angle between force and displacement is acute then the work done is

Differentiate between surface water and ground water.

Differentiate between surface water and ground water.

Assertion : The cells of endothecium are hygroscopic in nature. Reason : They absorb water from air.

The contact angle between pure water and pure sliver is 90^@ If a capillary tube made of silver is dipped at one end in pure water, will the water rise in the capillary?

Assertion (A) :No new substance is formed when water is heated to get steam. Reason (R) : Conversion of water into steam is a physical change.

Assertion : The air buble shines in water. Reason : Air bubble in water shines due to refraction of light.

A capillary tube of radius 1 mm is kept vertical with the lower end in water. (a) Find the height of water raised in the capillary. (b) If the length of the capillary tube is half the answer of part (a), find the angle theta made by the water surface in the capillary with the wall.

Assertion (A) : It is easier to swim in sea water than in river water. Reason (R): Density of sea water is more than that of river water.