question_answer

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.                                                                     [JEE ONLINE 09-04-2013]

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 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.

A)       Statement -1 is true, Statement-2 is true. Statement-2 is not correct explanation for statement-1.

B)      Statement -1 is false. Statement -2 is true.

C) Statement -1 is true. Statement-2 is false.

D)      [d] Statement-1 is true, Statement-2 is true. Statement-2 is correct explanation for statement-1.

Correct Answer: B

Solution :

increase,  decrease

So, h should decrease.