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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 statements, choose the correct answer from the options given below. (1) Statement-I is false but Statement-II is true. (2) Both Statement-I and Statement-II are true. (3) Both Statement-I and Statement-II are false. (4) Statement-I is true and Statement-II is false.

1. Statement-I is false but Statement-II is true.
2. Both Statement-I and Statement-II are true.
3. Both Statement-I and Statement-II are false.
4. Statement-I is true and Statement-II is false.

Correct answer: Statement-I is false but Statement-II is true.

Solution

Statement-I is incorrect because a liquid will rise or fall in a capillary tube depending on the contact angle; a contact angle of 0° indicates complete wetting, leading to a rise. Statement-II is correct as the contact angle is indeed influenced by the properties of both the solid and the liquid involved.

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