Question

Due to capillary action a liquid will rise in a tube if the angle of contact is

Answer 1

Due to capillary action a liquid will rise in a tube if the angle of contact is acute

Answer 2

The answer is acute.

Due to capillary action, a liquid will rise in a tube if the angle of contact is acute.

In the above case, when the angle of contact is acute, the surface of the liquid is curved upwards in a concave pattern. Hence, the angle of contact between a liquid and the surface of the solid is very small. This results in the surface getting wet by the liquid.