DISTILLATION
TOP 10 MCQ
1. The method by which different constituents of a liquid mixture can be separated without decomposition of the constituents is [GPAT-2017]
(a) Distillation under reduced pressure
(b) Molecular distillation
(c) Steam distillation
(d) Fractional distillation
2. Water for injection is prepared by using distillation [GPAT-2022]
(a) Fractional
(b) Molecular
(c) Density
(d) Freezing point
3. If the distillation graph using McCabe Thiele method is parallel to x-axis, then the feed is which one of the following [GPAT-2011]
(a) Saturated liquid
(b) Saturated vapor
(c) Superheated liquid
(d) Superheated vapor
4. Which statement is NOT true for steam distillation [GPAT-2011]
(a) It is also called differential distillation
(b) It can be used for separation of immiscible liquids
(c) It can be applied for volatile substance
(d) It can be used for separation of miscible liquids
5. The Florentine receiver is used to separate the liquids based on [GATE-2009]
(a) Molecular weight
(b) Sedimentation rate
(c) Simple
(d) Steam
6. The process of distillation is used for the liquids having
(a) Sufficient difference in their boiling point
(b) Sufficient difference in their melting point
(c) Sufficient difference in their solubility
(d) None of the mentioned
7. Porcelain pieces are put into the distillation flask to avoid
(a) Overheating
(b) Uniform boiling
(c) Bumping of the solution
(d) None of them
8. Liquid–liquid extraction is an alternative to one of the following unit operations
(a) Centrifugation
(b) Distillation
(c) Evaporation
(d) Filtration
9. One of the following theories is NOT applicable to distillation
(a) Graham’s law of diffusion
(b) Law of conservation of energy
(c) Law of conservation of matter
(d) Raoult’s law
10. Distillation does NOT involve in one of the following processes
(a) Evaporation
(b) Extraction
(c) Purification
(d) Separation
ANSWER KEY
| 1-b | 2-c | 3-a | 4-d | 5-c | 6-a | 7-c | 8-b | 9-a | 10-b |
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