Purification (Crystallization, Sublimation, Distillation,...) NEET Questions

Organic Chemistry - Purification and Characterization of Organic Compounds

Purification (Crystallization, Sublimation, Distillation,...) MCQ Questions


13.
Simple distillation is not suitable when:
A.
Boiling points are >50°C apart
B.
Liquids form azeotropes
C.
Liquids are non-volatile
D.
Solids are mixed
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ANSWER :
B. Liquids form azeotropes
14.
Which is used for separation of volatile components from non-volatile ones?
A.
Chromatography
B.
Simple distillation
C.
Filtration
D.
Centrifugation
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ANSWER :
B. Simple distillation
15.
Differential extraction is used to separate compounds based on:
A.
Boiling point
B.
Density
C.
Solubility in immiscible solvents
D.
Adsorption
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ANSWER :
C. Solubility in immiscible solvents
16.
Which purification method utilizes phase distribution between two solvents?
A.
Fractional distillation
B.
Sublimation
C.
Differential extraction
D.
Crystallization
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ANSWER :
C. Differential extraction
17.
Which technique is useful for identifying compounds in a mixture?
A.
Filtration
B.
Paper chromatography
C.
Decantation
D.
Distillation
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ANSWER :
B. Paper chromatography
18.
The process of separating solid impurities from liquids is called:
A.
Crystallization
B.
Filtration
C.
Sublimation
D.
Centrifugation
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ANSWER :
B. Filtration