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JEE Main & Advanced JEE Main Online Paper (Held on 9 April 2013)

  • 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.                 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.                   JEE Main Online Paper (Held On 09 April 2013)

    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)                 Statement-1 is true, Statement-2 is true. Statement-2 is correct explanation for statement-1.                   

    Correct Answer: B

    Solution :

                    \[h=\frac{2s\,\cos \theta }{\rho rg}\]                 \[T\to \]increase, \[S\to \] decrease                 So, h should decrease.                


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