JEE Mains · Physics · STD 11 - 9.2 surface tension
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. In the light of the above statements, choose the correct answer from the options given below :
- 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 & Solution
Correct Answer
(C) Statement \(I\) is true but Statement \(II\) is false.
Step-by-step Solution
Detailed explanation
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 \(h==\frac{2 T \cos \theta_C}{\rho g r}\) where \(r\) is radius of Tube (assuming length of capillary is sufficient)…
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