Question

A concave meniscus is observed for a liquid kept in a capillary tube, then angle of contact can be

• A. ${85}^{\circ }$
• B. ${93}^{\circ }$
• C. ${100}^{\circ }$
• D. ${95}^{\circ }$

Answer 1

The correct option is A ${85}^{\circ }$

We know,
For concave meniscus
Angle of contact, $\theta <{90}^{\circ }$
$\therefore$ Option (a) is correct.