Question

A liquid will NOT wet the surface of a solid if its angle of contact is

• A. Zero
• B. Less than ${90}^{\circ }$
• C. More than ${90}^{\circ }$
• D. ${90}^{\circ }$

Answer 1

The correct option is C More than ${90}^{\circ }$

A liquid will not wet the surface of a solid, if its angle of contact is more than ${90}^{\circ }$.
For example, mercury does not wet the glass surface as its contact angle is more than ${90}^o$.