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 coloured components of inks migrate at different rates because paper selectively retains different components according to the difference in their partition between the two phases.
(i) Both A and R are correct and R is the correct explanation of A.
(ii) Both A and R are correct but R is not the correct explanation of A.
(iii) Both A and R are not correct.
(iv)A is not correct but R is correct.
The chromatography paper is used in paper chromatography, contains water in it, which is the stationary phase, and the solvent used is as the mobile phase. A strip of chromatography paper spotted at the base with ink is suspended in a suitable solvent.
The two inks are spotted at the base of the paper strip, and is dipped into the mobile phase, as the solvent rises up the paper by capillary action and flows over the spot selectively the paper retains different components according to their affinity for the paper.
Hence, the coloured components of inks migrate at different rates because paper selectively retains different components according to the difference in their partition between the two phases.
The assertion and reason both are correct and reason is correct explanation of the assertion.
Option (i) is correct answer.