Question

What change will happen to the water level in the test tube when the glass bottle is kept in hot water​

Answer 1

Capillarity is the result of surface, or interfacial, forces. The rise of water in a thin tube inserted in water is caused by forces of attraction between the molecules of water and the glass walls and among the molecules of water themselves. ... The narrower the bore of the capillary tube, the higher the water rises.