Question

Which of the following can be a possible contact angle with water for a colloidal particle?

• A. $0^{\circ }$
• B. ${30}^{\circ }$
• C. ${60}^{\circ }$
• D. ${100}^{\circ }$

Answer 1

The correct option is D

${100}^{\circ }$

Hydrophobic materials always have a contact angle large than ${90}^{\circ }$ with water as they are repelled by water.