Q80 / 90 · JEE Main 2024 (05 Apr Shift 1) · Physics
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 liquid as well.
In the light of the above statement, choose the correct answer from the options given below.
- ABoth Statement I and Statement II are false
- BBoth Statement I and Statement II are true
- Correct answerCStatement I is false but Statement II is true
- DStatement I is true and Statement II is false
Solution
Capillary rise
$\mathrm{h}=\frac{2 \mathrm{~T} \cos \theta}{\rho \mathrm{gr}} \text {; }$
If $\theta=0^{\circ}$ then rise is non-zero
$\therefore$ Statement-1 is incorrect.
Hence, the correct answer is option: 'C'.