Angle of Contact & Capillarity
This question has Statement-1 and Statement-2. Of the four choices given after the Statements, choose the one that best describes the two Statements.
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.
Show answer and solution
Answer: (b)
- Statement-2: surface tension decreases as temperature rises. True.
- Statement-1: (with , fixed), so decreases on heating, not increases. False.
- So the answer is (b) Statement-1 is false, Statement-2 is true.