Q 11-09-067JEE MainJEE Main 2024 (29 Jan, Shift 1)Easy
Given below are two statements:
Statement I: If a capillary tube is immersed first in cold water and then in hot water, the height of capillary rise will be smaller in hot water.
Statement II: If a capillary tube is immersed first in cold water and then in hot water, the height of capillary rise will be smaller in cold water.
In the light of the above statements, choose the most appropriate from the options given below:
Answer: (C) Statement I is true but Statement II is false
Capillary rise $h = \dfrac{2T\cos\theta}{r\rho g}$. Surface tension $T$ decreases as temperature rises, so the rise is smaller in hot water and larger in cold water.
Statement I is true and Statement II is false.
Solution by Sreeraj P, M.Sc Physics