STANDARDPhysics-Fluid Mechanics
STANDARD Physics Surface Tension MCQ Question
Type: MCQ-conceptual-Medium
A liquid does not wet the solid surface if the angle of contact is
A
Zero
B
Equal to 45°
C
Equal to 90°
D
Greater than 90°
Correct Answer
Option D
Detailed Explanation
A liquid does not wet the solid surface if the angle of contact is obtuse (i.e., θ > 90°). This indicates that the cohesive forces within the liquid are stronger than the adhesive forces between the liquid and the solid.
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