Question

Give name of two materials used as stationary phase in chromatography.

Answer 1

Hint :Chromatography is defined as a laboratory technique for the separation of a mixture. Chromatography consists of two phases: mobile phase and stationary phase. In chromatography, the stationary phase can be solid or a liquid supported on a solid. The stationary phase is kept fixed while the mobile phase is passed through this stationary phase.

Complete Step By Step Answer:
Alumina and silica gel are the two materials used in the stationary phase.
The different constituents of the mixture are known to have different affinities for the stationary phase. The different molecules stay shorter or longer on the stationary phase, depending on their interactions with its surface sites. The mixture is dissolved in a fluid which is called the mobile phase.
Stationary phase, is the phase over which the mobile phase is passed in the technique of chromatography. The stationary phase is a porous solid that is packed into a metal or glass tube.
Chromatography is based on the concept of separating molecules in a mixture added to the ground or solid and liquid stationary state when travelling with the aid of a mobile phase

Additional Information:
Chromatography is used in industrial processes to purify materials, test trace amounts of contaminants, isolate chiral compounds and quality control test products. Chromatography is the physical process of analysing or separating complex mixtures.

Note :
There are four types of Chromatography: Liquid Chromatography, Gas Chromatography, Thin Layer Chromatography and Paper chromatography. In the stationary phase, the particle should have uniform size.