AIIMS 2019 Physics Applications of Surface Tension MCQ Question
Assertion: Sometimes insects can walk on water.
Reason: The gravitational force on insect is balanced by force due surface tension.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Correct Answer
Detailed Explanation
Insects can walk on water due to the phenomenon of surface tension, which arises from cohesive forces between water molecules (H₂O). The weight of the insect is counterbalanced by the surface tension, allowing it to remain on the surface without sinking. Option B is incorrect because it contradicts the established scientific principle of surface tension. Options C and D are irrelevant as the statement is clearly supported by the principles of physics and biology.
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