Assertion :The free surface of a liquid at rest, under gravity, in a container is always horizontal Reason: The forces acting on a fluid at rest have to be normal to the surface

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Surface tension is the force acting on the free surface & for a fluid at rest it is always horizontal & at equilibrium. Hence the force acting on a fluid at rest has to be normal.

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