Question
Given below are two statements :

Statement $I$ : The contact angle between a solid and a liquid is a property of the material of the solid and liquid as well.

Statement $II$ : The rise of a liquid in a capillary tube does not depend on the inner radius of the tube.

In the light of the above statements, choose the correct answer from the options given below :

Answer

Statement $I$ is correct as we know contact angle depends on cohesine and adhesive forces.

Statement $II$ is incorrect because height of liquid is given by $h==\frac{2 T \cos \theta_C}{\rho g r}$ where $r$ is radius of

Tube (assuming length of capillary is sufficient) Hence option $(3)$ is correct.

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