Question

If the angle of contact between the liquid and container is 90 degrees then? (C is the cohesive and A is the Adhesive force)

(a) C > A

(b) C = A

(c) C < A

(d) C is not equal to A

I got this question during an interview.

This interesting question is from States of Matter in portion States of Matter of Chemistry – Class 11

Answer 1

The correct answer is (b) C = A

For explanation: When the angle of contact between the liquid and container is 90 degrees then the cohesive and adhesive forces in a liquid are equal. Cohesive force is the attraction between similar atoms and adhesive between different atoms.