Question

The angle of contact between a glass capillary tube of length $10cm$ and a liquid is ${90}^o$. If the capillary tube is dipped vertically in the liquid, then the liquid

• A. Will rise in the tube
• B. Will get depressed in the tube
• C. Will rise up to $10cm$ in the tube and will over flow
• D. Will neither rise nor fall in the tube

Answer 1

The correct option is D Will neither rise nor fall in the tube

The right $\left({90}^0\right)$ angle of contact implies that cohesion force & adhesive forces are equal in magnitude. Hence we will observe no capillary rise in this case.