Question

The height up to which water will rise in a capillary tube will be

• A. Minimum when water temperature is $4^{\circ }C$
• B. Maximum when water temperature is $4^{\circ }C$
• C. Maximum when water temperature is $0^{\circ }C$
• D. Minimum when water temperature is $0^{\circ }C$

Answer 1

The correct option is A Minimum when water temperature is $4^{\circ }C$

The height of rise in capillary, $h=\frac{2T\cos \theta }{r\rho g}$
For water, the density is maximum at $4^{\circ }C$, so height is minimum at $4^{\circ }C$.