Class 11Chemistry8-3.Organic Chemistry : Purification and characterizationPurification of Organic Compounds
MediumExplain the principle of paper chromatography.
(N/A) Paper chromatography is a type of partition chromatography.
In this technique,a specialized filter paper acts as the stationary phase,which is primarily composed of cellulose.
The moisture trapped within the cellulose fibers acts as the stationary liquid phase.
The mobile phase,which is a suitable solvent or mixture of solvents,moves through the paper via capillary action.
When a mixture is spotted on the paper,the individual components partition themselves between the stationary phase (water trapped in cellulose) and the moving mobile phase.
Since each component has a different partition coefficient,they migrate at different rates along the paper,leading to their separation.
In this technique,a specialized filter paper acts as the stationary phase,which is primarily composed of cellulose.
The moisture trapped within the cellulose fibers acts as the stationary liquid phase.
The mobile phase,which is a suitable solvent or mixture of solvents,moves through the paper via capillary action.
When a mixture is spotted on the paper,the individual components partition themselves between the stationary phase (water trapped in cellulose) and the moving mobile phase.
Since each component has a different partition coefficient,they migrate at different rates along the paper,leading to their separation.
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Similar Questions
On a thin layer chromatographic plate,an organic compound moved by $3.5 \ cm$,while the solvent moved by $5 \ cm$. The retardation factor of the organic compound is . . . . . . $\times 10^{-1}$.
DifficultJEE MAIN 2024
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 SolutionThe fragrance of flowers is due to the presence of some steam volatile organic compounds called essential oils. These are generally insoluble in water at room temperature but are miscible with water vapour in the vapour phase. $A$ suitable method for the extraction of these oils from the flowers is:
DifficultJEE MAIN 2024
View SolutionThe correct match between Item $I$ and Item $II$ is
Item $I$ Item $II$ $a$. Benzaldehyde $p$. Mobile phase $b$. Alumina $q$. Adsorbent $c$. Acetonitrile $r$. Adsorbate
| Item $I$ | Item $II$ |
| $a$. Benzaldehyde | $p$. Mobile phase |
| $b$. Alumina | $q$. Adsorbent |
| $c$. Acetonitrile | $r$. Adsorbate |
DifficultJEE MAIN 2019
View SolutionGiven below are two statements:
Statement-$I$: Retardation factor $(R_f)$ can be measured in $meter/centimeter$.
Statement-$II$: $R_f$ value of a compound remains constant in all solvents.
Choose the most appropriate answer from the options given below:
Statement-$I$: Retardation factor $(R_f)$ can be measured in $meter/centimeter$.
Statement-$II$: $R_f$ value of a compound remains constant in all solvents.
Choose the most appropriate answer from the options given below:
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