Class 11Chemistry3 Organic Chemistry: Purification and CharacterisationPurification of Organic Compounds
MediumFill in the blanks:
$1$. In formulas and reactions,the electron pair displacement is indicated by a curved arrow,and the single electron displacement is indicated by a ..........
$2$. There are more than .......... plates in the columns of fractional distillation.
$3$. Fractional distillation is used for the separation of liquids with a .......... difference in boiling points,and simple distillation is used for the separation of liquids with a .......... difference in boiling points.
$4$. The .......... technique is applied to separate different fractions of crude oil in petroleum.
$1$. In formulas and reactions,the electron pair displacement is indicated by a curved arrow,and the single electron displacement is indicated by a ..........
$2$. There are more than .......... plates in the columns of fractional distillation.
$3$. Fractional distillation is used for the separation of liquids with a .......... difference in boiling points,and simple distillation is used for the separation of liquids with a .......... difference in boiling points.
$4$. The .......... technique is applied to separate different fractions of crude oil in petroleum.
(N/A) $1$. Half-headed curved arrow (fish-hook arrow)
$2$. $100$
$3$. Small,large
$4$. Fractional distillation
$2$. $100$
$3$. Small,large
$4$. Fractional distillation
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On which principle does the solvent move on chromatography paper?
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View SolutionState 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.
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View SolutionMatch List-$I$ with List-$II$:
List-$I$ List-$II$ $(A)$ Chloroform and Aniline $(I)$ Steam distillation $(B)$ Benzoic acid and Naphthalene $(II)$ Sublimation $(C)$ Water and Aniline $(III)$ Distillation $(D)$ Naphthalene and Sodium chloride $(IV)$ Crystallisation
| List-$I$ | List-$II$ |
| $(A)$ Chloroform and Aniline | $(I)$ Steam distillation |
| $(B)$ Benzoic acid and Naphthalene | $(II)$ Sublimation |
| $(C)$ Water and Aniline | $(III)$ Distillation |
| $(D)$ Naphthalene and Sodium chloride | $(IV)$ Crystallisation |
The 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 SolutionBy the crystallisation of an impure compound,if the mother liquor becomes coloured,what shall be done to remove the colour?
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