Question

What is angle of contact ​

Answer 1

$\bold{ANSWER}$

It is the angle between the tangent drawn to the liquid surface at the point of contact and the solid surface within the liquid.

The angle of contact is acute (<90°) for concave meniscus .The liquids having acute angle wets the surfaces, which are in contact. The angle of contact between ordinary glass and ordinary water is acute. It is about (8°).

The angle of contact is obtuse (>90° and <180°) for convex meniscus. The liquid having obtuse angle does not wet the surfaces. The angle of contact between Mercury and any surface is obtuse. (It is about 135°)

Answer 2

Heya!

Hers is ur answer..

Angle of contact

• Angle of contact can be defined as,"The angle, which is measured convectionally through the liquid..where the liquid vapour interface meets a solid surface"

Hope it helps