Question

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

Answer 1

Answer:

Chromatography

Explanation:

Chromatography is the separation of coloured dyes

Answer 2

The dyes present in fountain pen ink can be separated by the technique of chromatography.

Explanation:

• Chromatography is the method used to separate the dyes present in fountain pen ink. In other words, the analysing and separating materials from a mixture is called chromatography.  
• A mixture of several dyes forms ink and these colors can be separated from one another using chromatography.
• This is done by exposing ink to certain solvents which dissolve the colors and they can be separated out.
• In forensic science, the unknown ink is analysed and compared with writing utensils collected from the possible suspects.