Class 11Chemistry3 Organic Chemistry: Purification and CharacterisationPurification of Organic Compounds
MediumExplain the sublimation technique used for the purification of organic compounds.
(N/A) Definition: On heating,some solid substances change directly from the solid state to the vapour state without passing through the liquid state. The purification technique based on this principle is known as sublimation.
Uses: It is used to separate sublimable compounds from non-sublimable impurities.
Examples: The sublimation technique is used for the purification of a mixture of $CaSO_4$ and camphor. Camphor undergoes sublimation and is separated,while $CaSO_4$ remains at the bottom as it does not sublime.
Uses: It is used to separate sublimable compounds from non-sublimable impurities.
Examples: The sublimation technique is used for the purification of a mixture of $CaSO_4$ and camphor. Camphor undergoes sublimation and is separated,while $CaSO_4$ remains at the bottom as it does not sublime.
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Similar Questions
Match List-$I$ with List-$II$.
List-$I$ (Purification technique) List-$II$ (Mixture of organic compounds) $(A)$ Distillation (simple) $(I)$ Diesel + Petrol $(B)$ Fractional distillation $(II)$ Aniline + Water $(C)$ Distillation under reduced pressure $(III)$ Chloroform + Aniline $(D)$ Steam distillation $(IV)$ Glycerol + Spent-lye
Choose the correct answer from the options given below $:$
| List-$I$ (Purification technique) | List-$II$ (Mixture of organic compounds) |
| $(A)$ Distillation (simple) | $(I)$ Diesel + Petrol |
| $(B)$ Fractional distillation | $(II)$ Aniline + Water |
| $(C)$ Distillation under reduced pressure | $(III)$ Chloroform + Aniline |
| $(D)$ Steam distillation | $(IV)$ Glycerol + Spent-lye |
Choose the correct answer from the options given below $:$
State whether the following statements are True or False:
$(i)$ The boiling points of chloroform and aniline are $334 \ K$ and $457 \ K$ respectively.
$(ii)$ The vapour of chloroform is obtained after aniline in simple distillation.
$(iii)$ Chloroform is more volatile than aniline.
$(i)$ The boiling points of chloroform and aniline are $334 \ K$ and $457 \ K$ respectively.
$(ii)$ The vapour of chloroform is obtained after aniline in simple distillation.
$(iii)$ Chloroform is more volatile than aniline.
Easy
View SolutionThin-layer chromatography is an example of
Medium
View SolutionWhich purification technique is used for high boiling organic liquid compounds that decompose near their boiling point?
$A$ liquid with a high boiling point decomposes on simple distillation,but it can be steam distilled for its purification. Explain how this is possible.
Medium
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