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Categories >> Sciences >> Chemistry >> General Chemistry
 
 


 

 
 Organic Chemistry interview questions  Organic Chemistry Interview Questions (222)
 Inorganic Chemistry interview questions  Inorganic Chemistry Interview Questions (96)
 Analytical Chemistry interview questions  Analytical Chemistry Interview Questions (850)
 Physical Chemistry interview questions  Physical Chemistry Interview Questions (57)
 General Chemistry interview questions  General Chemistry Interview Questions (283)
 Chemistry AllOther interview questions  Chemistry AllOther Interview Questions (71)
Question
Explain the Purification of Organic Compounds ?
 Question Submitted By :: General-Chemistry
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
For purification of solids following methods are employed

Crystallization:-In this process compound is dissolved in
suitable solvent and this saturated solution of impure
substance is filtered through the funnel. The filterate
which is hot is now allowed to stand undisturbed, with the
result crystals deposits are found. These crystals can be
than washed on porcelain funnel of Buckner type

Sublimation:-Certain compounds on heating pass directly from
solid into gases and on cooling is the gases these at once
form solids e.g. naphthalene campor etc..

Purification of liquids:-There are number of methods for
this which are as follows:

(a)Simple Distillation:-In this process, vaporisation and
crystallization go in side by side

(b)Distillation under reduced pressure:-When heated to B.P.,
organic compounds get decomposed e.g. glycerine. These
substances can be purified by these processes

(c)Stem Distillation :-Liquids which possess high vapour
pressure e.g. aniline is purified by this method

Chromatography:-This is based on differential absorption of
the different constituents of mixture on varions absorbent
e.g. magnesium oxide, silica gel etc.
 
Is This Answer Correct ?    62 Yes 16 No
Guest
 
Answer
# 2
preparation of thin layer chromatography 
Is This Answer Correct ?    28 Yes 13 No
Jay
 
 
 
Answer
# 3
THE PURIFICATION OF THE ORGANIC COMPOUNDS CAN BE DONE BY
SEVERAL WAY SUCH AS COLOUMN CHROMATOGRAPHY,
RECRASTALISATION BY USING THE SUITABLE SOLVENT,
DISTILLATION, FILLTRAION,WASHING. PURIFICATION MAY DEPENDS
ON THE NATURE OF COMPOUND AND THE INMPURITY IN IT.
 
Is This Answer Correct ?    18 Yes 10 No
Kiran Kulkarni
 
Answer
# 4
organic compounds can be purified by physical as well as chemical methods:
some of them are: crystallization,fractional crystallization,sublimation,separation of two liquids using separating funnel,simple distillation,fractional distillation( it should be noted that fractional distillation of compounds liquids mixture is possible only if they do not form a constant boiling azeotrope mixture,distillation,steam distillation,extraction with a solvent,azeotropic distillation,chromatography

chromatography may be classified as gas chromatography and liquid chromatography.
 
Is This Answer Correct ?    12 Yes 7 No
Magesh
 
Answer
# 5
Differantial extraction by using particular solvent is an
another means of purification
 
Is This Answer Correct ?    11 Yes 8 No
Payal Jain
 
Answer
# 6
The following are available for the purification of organic
compounds
1. Sublimation
2. chrystallization
3. Distillation
4. Differential Extraction
5. Colour chromatography
 
Is This Answer Correct ?    2 Yes 0 No
Adewumi Oluwadamilare
 
Answer
# 7
Purification of organic compounds can be done by five methods:-
* Sublimation.
* Crystallisation.
* Distillation.
* Differential extraction.
* Chromatography.
 
Is This Answer Correct ?    1 Yes 0 No
Sushma. V . Raj
 

 
 
 
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