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JEE Mains · Physics · STD 11 - Surface tension
- JEE Mains 2013
- Medium
- MCQ
This question has Statement-I and Statement-2. Of the four ch.oices given after the Statements, choose the one that best describes the two Statetnents. Statement \(-1\) : A capillary is dipped in a liquid and liquid rises to a height \(h\) in it. As the temperature of the liquid is raised, the height \(h\) increases (if the density of the liquid and the angle of contact remain the same). Statement \(-2\) : Surface tension of a liquid decreases with the rise in its temperature.
Pick an option to check your answer.
Answer & Solution
Correct Answer
(B) Statement \(-1\) is false, Statement \(-2\) is true
Step-by-step Solution
Detailed explanation
Surface tension of a liquid decreases with the rise in temperture. At the boiling point of liquid, surface tension is zero.
\(Capillary\,rise\,h = \frac{{2T\cos \theta }}{{rdg}}\)
As surface tension \(T\) decreases with rise in temperature hence capillary rise also decreases.
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