Assertion :Particles of a colloidal solution do not settle down when left undisturbed, while in the case of a suspension they do. Reason: Particle size in a suspension is larger than those in a colloidal solution and molecular interaction in a suspension is not strong enough to keep the particles suspended

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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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Particle size in a suspension is larger than those in a colloidal solution.
Also molecular interaction in a suspension is not strong enough to keep the particles suspended and hence they settle down.
Hence, option $A$ is correct.

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