Class 11Chemistry8-3.Organic Chemistry : Purification and characterizationPurification 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.
Explore More
Similar Questions
The mixture of compounds $A$ and $B$ is passed through a column of $Al_2O_3$ by using alcohol as eluant. Compound $A$ is eluted in preference to compound $B$. Which of the compounds $A$ or $B$ is more readily adsorbed on the column?
Medium
View SolutionWhich of the following compounds is used as an adsorbent in column chromatography?
Easy
View SolutionMatch items of Column-$I$ and Column-$II$.
Column-$I$ (Mixture of compounds)
Column-$II$ (Separation Technique)
$A$. $H_2O / CH_2Cl_2$
$I$. Crystallization
$B$. $\alpha$-tetralone / $p$-nitrophenol
$II$. Differential solvent extraction
$C$. Kerosene / Naphthalene
$III$. Column chromatography
$D$. $C_6H_{12}O_6 / NaCl$
$IV$. Fractional Distillation
Correct match is:
| Column-$I$ (Mixture of compounds) | Column-$II$ (Separation Technique) |
|---|---|
| $A$. $H_2O / CH_2Cl_2$ | $I$. Crystallization |
| $B$. $\alpha$-tetralone / $p$-nitrophenol | $II$. Differential solvent extraction |
| $C$. Kerosene / Naphthalene | $III$. Column chromatography |
| $D$. $C_6H_{12}O_6 / NaCl$ | $IV$. Fractional Distillation |
Correct match is:
DifficultJEE MAIN 2023
View SolutionWhich of the following organic compounds could not be dried by anhydrous $CaCl_{2}$?
DifficultMHT CET 2012
View SolutionWhich of the following statements are correct?
$A$. Glycerol is purified by vacuum distillation because it decomposes at its normal boiling point.
$B$. Aniline is purified by steam distillation as it is immiscible in water.
$C$. Ethanol can be separated from an ethanol-water mixture by azeotropic distillation because it forms an azeotrope.
$D$. An organic compound is pure if the mixed $M.P.$ remains the same.
Choose the most appropriate answer from the options given below:
$A$. Glycerol is purified by vacuum distillation because it decomposes at its normal boiling point.
$B$. Aniline is purified by steam distillation as it is immiscible in water.
$C$. Ethanol can be separated from an ethanol-water mixture by azeotropic distillation because it forms an azeotrope.
$D$. An organic compound is pure if the mixed $M.P.$ remains the same.
Choose the most appropriate answer from the options given below:
Vedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo