NEET Physics Surface Tension MCQ Question
What happens to the angle of contact when soaps or detergents are added to water?
The angle of contact becomes smaller.
The angle of contact remains unchanged.
The angle of contact becomes larger.
The angle of contact fluctuates randomly.
Correct Answer
Detailed Explanation
Soaps and detergents act as wetting agents, which reduce the angle of contact, allowing them to penetrate well into surfaces, as stated in the NCERT context.
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