Q 11-09-060JEE MainJEE Main 2024 (5 Apr, Shift 1)Easy
Given below are two statements:
**Statement I:** When a capillary tube is dipped into a liquid, the liquid neither rises nor falls in the capillary. The contact angle may be $0^\circ$.
**Statement II:** The contact angle between a solid and a liquid is a property of the material of the solid and the liquid as well.
In the light of the above statements, choose the correct answer from the options given below.
Answer: (C) Statement I is false but Statement II is true
$h = \dfrac{2T\cos\theta}{r\rho g} = 0$ requires $\cos\theta = 0$, i.e. $\theta = 90^\circ$, not $0^\circ$. Statement I is false.
The contact angle depends on both the solid and the liquid. Statement II is true.
Solution by Sreeraj P, M.Sc Physics