Ncert Exercises & Solutions

Select the correct option based on statements below:

Assertion (A):	An ordinary filter paper impregnated with collodion solution stops the flow of colloidal particles.
Reason (R):	The pore size of the filter paper becomes larger than the size of the colloidal particle.

1.	Both (A) and (R) are true and (R) is the correct explanation of (A).
2.	Both (A) and (R) are true but (R) is not the correct explanation of (A).
3.	(A) is true but (R) is false.
4.	(A) is false but (R) is true.

Hint: The pore size of the filter paper must be smaller than the size of the colloidal particle.

An ordinary filter paper impregnated with a collection solution stops the flow of colloidal particles because the pore size of the filter paper becomes smaller than the size of colloidal particles.

Hence, Assertion is true but the reason is false.

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