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(B) The height of the liquid rise in a capillary tube is given by the formula $h = \frac{2T \cos 	heta}{rdg}$,where $T$ is the surface tension,$	het

Vedclass · Accepted Answer

Statement-$I$ is false,Statement-$II$ is true.

Vedclass · Answer

(B) The height of the liquid rise in a capillary tube is given by the formula $h = \frac{2T \cos 	heta}{rdg}$,where $T$ is the surface tension,$	heta$ is the angle of contact,$r$ is the radius of the capillary,$d$ is the density,and $g$ is the acceleration due to gravity.Statement-$II$ is true because the surface tension $T$ of a liquid generally decreases as the temperature increases.According to the formula,since $h \propto T$,if the surface tension $T$ decreases with an increase in temperature,the height $h$ of the liquid rise must also decrease.Therefore,Statement-$I$ is false because it claims that the height $h$ increases with temperature,whereas it actually decreases.

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