Question

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R) :

Assertion (A) : Dissolved substances can be removed from a colloidal solution by diffusion through a parchment paper.

Reason (R) : Particles in a true solution cannot pass through parchment paper but the colloidal particles can pass through the parchment paper. In the light of the above statements, choose the correct answer from the options given below

• A. (A) is not correct but (R) is correct
• B. Both (A) and (R) are correct and (R) is the correct explanation of (A)
• C. (A) is correct but (R) is not correct
• D. Both (A) and (R) are correct but (R) is not the correct explanation of (A)

Answer 1

The correct option is C (A) is correct but (R) is not correct

Parchment paper is a semi-permeable membrane which allows particles of true solution to pass through as their size are too small.
But the colloidal particles cannot pass through it, hence Colloidal solution particles can be separated using parchment paper.

Assertion is correct but reason is incorrect.