Class 11Chemistry3 Organic Chemistry: Purification and CharacterisationPurification of Organic Compounds
EasyWhen is distillation under reduced pressure used?
- AWhen the liquid has a high boiling point and decomposes at or below its boiling point.
- BWhen the liquid has a very low boiling point.
- CWhen the liquid is insoluble in water.
- DWhen the liquid is insoluble in organic solvents.
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Similar Questions
Write the applications of chromatography.
Easy
View SolutionMatch column $-I$ and column $-II$ with the correct relation:
Column $-I$ Column $-II$ $(i)$ Liquid boiled at low temperature $(a)$ Fractional distillation $(ii)$ Glycerol from lye $(b)$ Simple distillation $(iii)$ The liquid with lower boiling point condenses first $(c)$ Steam distillation $(iv)$ The liquid with higher boiling point condenses first $(d)$ Distillation under reduced pressure
| Column $-I$ | Column $-II$ |
| $(i)$ Liquid boiled at low temperature | $(a)$ Fractional distillation |
| $(ii)$ Glycerol from lye | $(b)$ Simple distillation |
| $(iii)$ The liquid with lower boiling point condenses first | $(c)$ Steam distillation |
| $(iv)$ The liquid with higher boiling point condenses first | $(d)$ Distillation under reduced pressure |
Easy
View SolutionGlycerol boils at $290\,^oC$ with slight decomposition. Impure glycerin can be purified by:
Medium
View SolutionThin layer chromatography of a mixture shows the following observation:
The correct order of elution in the silica gel column chromatography is
The correct order of elution in the silica gel column chromatography is
Match List-$I$ with List-$II$:
List-$I$ (Mixture) List-$II$ (Separation Technique) $A$. $CHCl_3 + C_6H_5NH_2$ $I$. Steam distillation $B$. $C_6H_{14} + C_5H_{12}$ $II$. Differential extraction $C$. $C_6H_5NH_2 + H_2O$ $III$. Distillation $D$. Organic compound in $H_2O$ $IV$. Fractional distillation
| List-$I$ (Mixture) | List-$II$ (Separation Technique) |
|---|---|
| $A$. $CHCl_3 + C_6H_5NH_2$ | $I$. Steam distillation |
| $B$. $C_6H_{14} + C_5H_{12}$ | $II$. Differential extraction |
| $C$. $C_6H_5NH_2 + H_2O$ | $III$. Distillation |
| $D$. Organic compound in $H_2O$ | $IV$. Fractional distillation |
DifficultJEE MAIN 2023
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