The dyes present in fountain pen ink can be separated by the technique of :
(a) fractional distillation
(b) infrared photography
(c) crystallisation
(d) chromatography

Q.

The best and latest technique for isolation, purification and separation of organic compounds is:

(a) Crystallisation (b) Distillation (c) Sublimation (d) Chromatography

Q.

The various compounds present in coal tar are separated by the process of :

(a) simple distillation

(b) destructive distillation

(c) fractional distillation

(d) fractional crystallisation

Q.

Give a brief description of the principles of the following techniques taking an example in each case.

(a) Crystallisation (b) Distillation (c) Chromatography

Q. The dye from blue fountain pen can be separated by :

Q. (a) Name the process by which all the dye can be recovered from black ink.
(b) Name the process by which the various 'dyes' (coloured materials) present in black ink can be separated.