Question

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.

• A. Assertion and reason both are correct and the reason is the correct explanation of assertion
• B. Assertion and reason both are correct but reason does not explain assertion
• C. Both assertion and reason are incorrect.
• D. Assertion is incorrect but reason is correct.
• E. Assertion is correct but reason is incorrect.

Answer 1

The correct option is E

Assertion is correct but reason is incorrect.

Colloidal particles can pass through the filter papers as their pores are too large as compared to the size of the colloidal particles.
The pores of filter paper are reduced when it is impregnated with the collodion solution due to which the flow of the colloidal particles is stopped.
The pore size in this case is lesser than the colloidal particles due to which they stop.
Hence assertion is correct but reason is incorrect.