Question Detail
Question
Wetting is the ability of liquids to form interfaces with solid surfaces. What is a measure of the degree of wetting?
Correct Answer
Option C is the correct answer.
Detailed Explanation
The contact angle θ between a liquid and a solid surface is a direct measure of how well the liquid wets that surface. A smaller contact angle indicates greater wetting, with a 0° angle meaning perfect wetting.
Hint
A liquid that spreads out and 'wets' a surface forms a very small angle with it.