In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below each question.

Assertion (A): Components of a mixture of red and blue inks can be separated by distributing the components between stationary and mobile phases in paper chromatography.

Reason (R): The colored components of inks migrate at different rates because paper selectively retains different components according to the difference in their partition between the two phases.

Answers (1)

The answer is the option (i) Both A and R are correct, and R is the correct explanation of A.

Explanation: In paper chromatography what is used, is a special quality paper known as chromatography paper, which contains water trapped in it, and which acts as the stationary phase. A strip of chromatography paper which is spotted at its base is suspended with the solution of the mixture in a suitable solvent or a mixture of solvents. This solvent acts as the mobile phase. The solvent rises up the paper by the capillary action and flows all over to the spot. The paper now selectively retains different components according to their differing partition in the two phases. The paper strip so developed is now known as a chromatogram.

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