Assertion :An ordinary filter paper impregnated with collodion solution stops the flow of colloidal particles. Reason: Pore size of the filter paper becomes more than the size of colloidal particle.

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 C Assertion is correct but Reason is incorrect
Colloidal particles can pass through ordinary filter paper because the pores are too large. However, the pores of filter paper can be reduced in size by impregnating with a colloidal solution to stop the flow of colloidal particles.

Hence, Option "C" is the correct answer.

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