EASY
Earn 100

How is absolute alcohol prepared?
(a)Fractional distillation
(b)Kolbe's method
(c)Azeotropic distillation
(d)Vacuum distillation

50% studentsanswered this correctly
Important Questions on Organic Chemistry- Some Basic Principles and Techniques
MEDIUM
A chromatography column, packed with silica gel as stationary phase, was used to separate a mixture of compounds consisting of benzanilide aniline and acetophenone. When the column is eluted with a mixture of solvents, hexane:ethyl acetate , the sequence of obtained compounds is:

EASY
The principle of column chromatography 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 processes for refining of metals involves a principle of selective adsorption of the components from a mixture.

EASY
The correct match between Item I and Item II is:
Item I | Item II |
Benzaldehyde | Mobile phase |
Alumina | Adsorbent |
Acetonitrile | Adsorbate |

EASY
Paper chromatography is an example of

EASY
In chromatography, which of the following statements is incorrect for ?

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
Which of the following statements is not true about partition chromatography?

MEDIUM
The most suitable method of separation of mixture of ortho and para-nitrophenol is:

EASY
Aniline is insoluble in water and possesses a vapour pressure of at . It can be conveniently purified by

HARD
The catalyst used in the synthesis of 'wood spirit' from carbon monoxide and liydrogen is

EASY
Which of the following mixtures can be separated by simple distillation?

EASY
Glycerol is separated in soap industries by :

EASY
The organic compound which can be purified by steam distillation is :

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:

MEDIUM
Using the provided information in the following paper chromatogram:
The calculated value of .

EASY
The distillation technique most suited for separating glycerol from spent - lye in the soap industry is:

EASY
If Dichloromethane (DCM) and water are used for differential extraction, which one of the following statements is correct?

EASY
While making paneer (cottage cheese) from milk by adding dilute acetic acid, the milk proteins undergo

