Class 11Chemistry8-3.Organic Chemistry : Purification and characterizationPurification of Organic Compounds
EasyCompare the pressure of aniline and water in vapour phase distillation.
(N/A) In steam distillation,the mixture of organic liquid (aniline) and water boils when the sum of their individual vapour pressures equals the atmospheric pressure.
Let $p_1$ be the vapour pressure of water and $p_2$ be the vapour pressure of aniline.
The total pressure $p$ is given by Dalton's law of partial pressures as:
$p = p_1 + p_2$
Since the mixture boils at a temperature lower than the boiling point of either pure component,the individual vapour pressures $p_1$ and $p_2$ are each less than the total atmospheric pressure $p$.
Let $p_1$ be the vapour pressure of water and $p_2$ be the vapour pressure of aniline.
The total pressure $p$ is given by Dalton's law of partial pressures as:
$p = p_1 + p_2$
Since the mixture boils at a temperature lower than the boiling point of either pure component,the individual vapour pressures $p_1$ and $p_2$ are each less than the total atmospheric pressure $p$.
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Similar Questions
Match List-$I$ with List-$II$:
List-$I$ (Technique) List-$II$ (Application) $A$. Distillation $I$. Chloroform-Aniline $B$. Fractional distillation $II$. Separation of crude oil fractions $C$. Steam distillation $III$. Aniline-Water mixture $D$. Distillation under reduced pressure $IV$. Separation of glycerol from spent-lye
Choose the correct answer from the options given below:
| List-$I$ (Technique) | List-$II$ (Application) |
|---|---|
| $A$. Distillation | $I$. Chloroform-Aniline |
| $B$. Fractional distillation | $II$. Separation of crude oil fractions |
| $C$. Steam distillation | $III$. Aniline-Water mixture |
| $D$. Distillation under reduced pressure | $IV$. Separation of glycerol from spent-lye |
Choose the correct answer from the options given below:
DifficultJEE MAIN 2024
View SolutionGive the answer of the following questions in short:
$(i)$ When is simple distillation used?
$(ii)$ When is fractional distillation used?
$(iii)$ Which liquid is obtained first in fractional distillation?
$(iv)$ Which liquid is cooled first in fractional distillation?
$(v)$ What happens in the fractional column?
$(i)$ When is simple distillation used?
$(ii)$ When is fractional distillation used?
$(iii)$ Which liquid is obtained first in fractional distillation?
$(iv)$ Which liquid is cooled first in fractional distillation?
$(v)$ What happens in the fractional column?
Medium
View SolutionWhich property should a solvent used in crystallization possess?
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 SolutionWhich of the following statements about $TLC$ are correct?
$(i)$ Glycine is identified on $TLC$ plate due to its colour.
$(ii)$ Amino acids can be detected by spraying the $TLC$ plate with $Ninhydrin$ solution.
$(iii)$ The retardation factor $(R_f)$ is the ratio of the distance travelled by the solute to that of the solvent from the base line.
$(iv)$ Sodium chloride is commonly used as an adsorbent.
$(i)$ Glycine is identified on $TLC$ plate due to its colour.
$(ii)$ Amino acids can be detected by spraying the $TLC$ plate with $Ninhydrin$ solution.
$(iii)$ The retardation factor $(R_f)$ is the ratio of the distance travelled by the solute to that of the solvent from the base line.
$(iv)$ Sodium chloride is commonly used as an adsorbent.
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