Organic Chemistry NDA Questions

NDA Chemistry

Organic Chemistry MCQ Questions


1.
By Thin layer chromatography technique, the amino acids may be detected by spraying the chromaplate with _____ solution.
A.
Ninhydrin
B.
Brine
C.
Salt
D.
Sugar
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ANSWER :
A. Ninhydrin
2.
_____ technique is applied to separate substances which are steam volatile and are immiscible with water
A.
Sublimation
B.
Fractional distillation
C.
Steam distillation
D.
None of these
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ANSWER :
C. Steam distillation
3.
_____ is based on the fact that different compounds are adsorbed on an adsorbent to different degrees
A.
Adsorption chromatography
B.
Partition chromatography
C.
Fractional chromatography
D.
None of these
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ANSWER :
A. Adsorption chromatography
4.
Which of the following are the methods for estimation of nitrogen?
A.
Dumas method
B.
Kjeldahl's method
C.
Both a and b
D.
None of these
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ANSWER :
C. Both a and b
5.
One of the technological applications of fractional distillation is to separate different fractions of crude oil in _____ industry
A.
Lipids
B.
Fats
C.
Cooking oil
D.
Petroleum
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ANSWER :
D. Petroleum
6.
Glycerol can be separated from spent-lye in _____ industry by using the distillation under reduced pressure technique
A.
Soap
B.
Oil
C.
Food
D.
Milk
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ANSWER :
A. Soap