EASY
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During the process of distillation, the concentrate/distillate is collected in the distillation flask.
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Important Questions on Organic Chemistry- Some Basic Principles and Techniques
MEDIUM
The correct match between items of List-I and List-II is
| List - I | List - II | ||
| (A) | Coloured impurity | (P) | Steam distillation |
| (B) | Mixture of o – nitrophenol and p –nitrophenol | (Q) | Fractional distillation |
| (C) | Crude Naphtha | (R) | Charcoal treatment |
| (D) | Mixture of glycerol and sugars | (S) | Distillation under reduced pressure |
EASY
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as
Assertion (A): A simple distillation can be used to separate a mixture of propanol and propanone.
Reason (R): Two liquids with a difference of more than in their boiling points can be separated by simple distillations.
In the light of the above statements, choose the most appropriate answer from the options given below :
EASY
Match List I with List II:
| List I (Mixture) | List II (Separation Technique) |
||
| (A) | I | Steam distillation | |
| (B) | II | Differential extraction |
|
| (C) | III | Distillation | |
| (D) | Organic compound in | IV | Fractional distillation |
MEDIUM
The elution sequence of a mixture of compounds containing chlorobenzene, anthracene and -cresol developed from an alumina column using a solvent system of progressively increasing polarity is
MEDIUM
A flask contains a mixture of isohexane and -methylpentane. One of the liquids boils at while the other boils at What is the best way to separate the two liquids and which one will be distilled out first?
EASY
Which of the following statements is not true about partition chromatography?
HARD
Match List-I with List-II
| List-I (Mixture) |
List-II (Purification Process) |
||
| A | Chloroform & Aniline | I | Steam distillation |
| B | Benzoic acid & Napthalene | II | Sublimation |
| C | Water & Aniline | III | Distillation |
| D | Napthalene & Sodium chloride | IV | Crystallisation |
EASY
Given below are two statements:
Statement-I: Retardation factor can be measured in meter/centimetre.
Statement-II: value of a compound remains constant in all solvents.
Choose the most appropriate answer from the options given below:
EASY
Paper chromatography is an example of
EASY
Given below are two statements:
Statement : A mixture of chloroform and aniline can be separated by simple distillation.
Statement : When separating aniline from a mixture of aniline and water by steam distillation aniline boils below its boiling point.
In the light of the above statements, choose the most appropriate answer from the options given below:
EASY
The principle of column chromatography is:
EASY
In chromatography, which of the following statements is incorrect for ?
EASY
The distillation technique most suited for separating glycerol from spent - lye in the soap industry is:
HARD
Explain, why an organic liquid vaporises at a temperature below its boiling point in its steam distillation?
EASY
If the difference in boiling point of two liquids is not much, the ........ method is used to separate them.
HARD
Give a brief description of the principles of crystallisation techniques with an example.
HARD
Name a suitable technique of separation of the components from a mixture of calcium sulphate and camphor.
EASY
For the purification, isolation and separation of organic compounds, the latest technique followed is
EASY
Fractional distillation is a process by which the separation of different fractions from mixture of solution is carried by making use of the following property of the fractions.
EASY
Sugars are separated by using the solvent BAW (n-butanol acetic acid ) and detected by spraying the plate with
