Angle of Contact & Capillarity
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 .
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.
Show answer and solution
Answer: (b)
- Statement I: no rise or fall means , so , i.e. , not . False.
- Statement II: contact angle depends on both the solid and the liquid (adhesion vs cohesion). True.
- So the answer is (b) Statement I is false but Statement II is true.