Question

Paper chromatography is a type of?

Answer 1

Hint: Chromatography is a modern and sensitive technique used for rapid and efficient separation or analysis of components of mixture and purification of the compounds. The name chromatography is based on the Greek word.

Complete answer: The name chromatography is based on the Greek word where chroma meaning is colour and graphy means for writing because the method was 1st used for the separation of coloured substances found in plants. Based on the principle involves, it is classified as:
 Partial chromatography, which is also termed as paper chromatography;
This is a special type of chromatography in which both the stationary and mobile phase, both are liquid. Its common example is paper chromatography in which chromate graphic paper is used as an adsorbent surface as TLC plate in thin layer chromatography. The water trapped in paper acts as a stationary phase. In the paper chromatography, the chromatography paper is spotted by mixture containing different components and then placed in a solvent which acts as a mobile phase and rises up due to capillary action. The paper selectively retains different components named as chromatograms. These chromatograms may be observed in
Ultraviolet light or by spraying suitable reagent.

Note:
Once the compound has been properly purified and the purity checked by finding out the m.p. or b.p. depending upon their nature. Most of the pure compounds have sharp melting and boiling points. Nowadays the purity of an organic compound is determined by new methods based on different types of chromatographic and spectroscopic techniques.