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.
Text Solution
Verified by ExpertsA
Rise or fall of capillary height, 
If 
is 
rise of liquid
If 
is 
fall of liquid
For h be zero, contact angle 
.
(Statement I is incorrect.)
Contact angle between a solid and liquid depends upon the adhesive and cohesive forces between the two media. These forces are the properties of the material in contact i.e., solid and liquid, which decides the contact angle.
(Statement II is correct.)
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