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°.
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 above statement, choose the correct answer from the options given below.

Question

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°.

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 above statement, choose the correct answer from the options given below.

G1 Physics · Accepted Answer

Capillary rise is: h = 2T cosθ/(ρgr) If θ = 0°: cosθ = 1 Hence the capillary rise is non-zero. Therefore, Statement-I is false. Contact angle depends on the nature of the solid-liquid pair. Therefore, Statement-II is true.