Given below are two statements: Statement I: The contact angle be… - Vidyadip

MCQ

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.

A
Both Statement I and Statement II are false
B
Statement I is false but Statement II is true.
C
Statement I is true but Statement II is false.
D
Both Statement I and Statement II are true.

✓

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 $h ==\frac{2 T \cos \theta_{ C }}{\rho g r}$ Tube (assuming length of capillary is sufficient) Hence option (3) is correct.

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