Class 11Chemistry8-3.Organic Chemistry : Purification and characterizationPurification of Organic Compounds
MediumWhat is meant by the term "chromatography"?
(N/A) Chromatography is a collective term used for a family of laboratory techniques for the separation of mixtures.
The term is derived from Greek words 'chroma' meaning 'colour' and 'graphein' meaning 'to write'.
Chromatographic techniques are based on the principle that different components of a mixture are adsorbed to different extents on a stationary phase.
There are several chromatographic techniques such as paper chromatography,column chromatography,gas chromatography,etc.
The term is derived from Greek words 'chroma' meaning 'colour' and 'graphein' meaning 'to write'.
Chromatographic techniques are based on the principle that different components of a mixture are adsorbed to different extents on a stationary phase.
There are several chromatographic techniques such as paper chromatography,column chromatography,gas chromatography,etc.
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Similar Questions
On which principle does the solute move on chromatography paper?
Easy
View SolutionThe correct match between items of List-$I$ and List-$II$ is:
List-$I$ List-$II$ $A$. Coloured impurity $P$. Steam distillation $B$. Mixture of $o$-nitrophenol and $p$-nitrophenol $Q$. Fractional distillation $C$. Crude oil $R$. Charcoal treatment $D$. Mixture of glycerol and sugars $S$. Distillation under reduced pressure
| List-$I$ | List-$II$ |
| $A$. Coloured impurity | $P$. Steam distillation |
| $B$. Mixture of $o$-nitrophenol and $p$-nitrophenol | $Q$. Fractional distillation |
| $C$. Crude oil | $R$. Charcoal treatment |
| $D$. Mixture of glycerol and sugars | $S$. Distillation under reduced pressure |
Medium
View SolutionConsider the following table$-$
Column-$I$ Column-$II$ $(A).$ Best and latest technique for isolation,purification and separation of organic compounds $(i).$ Chromatography $(B).$ In Lassaigne's test for $N$ $(ii).$ Vacuum distillation (distillation under reduced pressure) $(C).$ In Lassaigne's test for $S$ $(iii).$ Violet coloured complex is formed $(D).$ Aniline is purified from water by $(iv).$ Prussian blue coloured complex is formed $(E).$ Glycerol is purified from spent lye $(v).$ Steam distillation
The correct match is $-$
| Column-$I$ | Column-$II$ |
|---|---|
| $(A).$ Best and latest technique for isolation,purification and separation of organic compounds | $(i).$ Chromatography |
| $(B).$ In Lassaigne's test for $N$ | $(ii).$ Vacuum distillation (distillation under reduced pressure) |
| $(C).$ In Lassaigne's test for $S$ | $(iii).$ Violet coloured complex is formed |
| $(D).$ Aniline is purified from water by | $(iv).$ Prussian blue coloured complex is formed |
| $(E).$ Glycerol is purified from spent lye | $(v).$ Steam distillation |
The correct match is $-$
Medium
View SolutionState whether the following statements are True or False:
$(i)$ The purification of a solid is done by crystallisation.
$(ii)$ Crystallisation purifies the solid and distillation purifies the liquid.
$(iii)$ $A$ liquid is purified by sublimation.
$(iv)$ To separate a mixture of ammonium chloride and sodium chloride,the distillation method is applied.
$(i)$ The purification of a solid is done by crystallisation.
$(ii)$ Crystallisation purifies the solid and distillation purifies the liquid.
$(iii)$ $A$ liquid is purified by sublimation.
$(iv)$ To separate a mixture of ammonium chloride and sodium chloride,the distillation method is applied.
Medium
View SolutionIn $TLC$ for compound $X$,$R_f = 0.7$ and for $B$,$R_f = 0.4$. Which substance migrates more?
Easy
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