Question

For a liquid which is rising in a capillary, the angle of contact is

• A. Obtuse
• B. Acute
• C. ${180}^o$
• D. ${90}^o$

Answer 1

The correct option is B Acute

If angle of contact is acute, liquid rises in a capillary tube whereas if angle of contact is obtuse, liquid is depresses in a capillary tube.

Since here, liquid is rising, therefore, angle of contact is acute.