Question

What will be the angle of contact of a liquid relative to a solid if forces of adhesion and cohesion are equal?

Options

• 0°

• 30°

• 90°

• None of these

Answer 1

90°

Explanation:

At equilibrium, force of adhesion = force of cohesion.

⇒ meniscus is neither convex or nor concave.

Hence, θ = 90°