Question

A liquid does not wet the sides of a solid, if the angle of contact is(a) Zero(b) Obtuse (more than 90°)(c) Acute (less than 90°)(d) 90° (right angle)

Answer 1

We know that the liquids make the solid substances wet,when they get into physical contact with each other.

This depends on the contact angle between the liquid and solid surfaces.

When the liquid does not wet the sides of a solid object,it means that the angle of contact is more than 90° but less than 180°.

That's why the correct answer of this question is option b,obtuse angle.