EXTRACTION
TOP 10 MCQ
1. The USP defines as liquid preparations of vegetable drugs, containing alcohol as a solvent or as a preservative, or both, so made that, unless otherwise specified in an individual monograph, each milliliter contains the therapeutic constituents of 1 gram of the standard drug that it represents [GPAT-2021]
(a) Tinctures
(b) Extracts
(c) Infusion
(d) Fluid extracts
2. In the process of extraction, if maceration is accomplished by heating the drug and solvent in a closed vessel, then this modification is known as [GPAT-2022]
(a) Digestion
(b) Refining
(c) Expression
(d) Rendering
3. Extraction is different from expression in one of the following
(a) Active constituents
(b) Crude solid
(c) Size reduction
(d) Solvent
4. Which one of the following is considered as non-selective solvent for extraction of drugs
(a) Amyl acetate
(b) Carbon tetrachloride
(c) Chloroform
(d) Water
5. The term “leaching” is used to describe extraction of soluble constituents from one of the following substances
(a) Gases
(b) Liquids
(c) Semisolids
(d) Solids
6. Solid-liquid extraction is achieved using one of the following equipment
(a) Baffle tower
(b) Diffusion battery
(c) Podbielniak extractor
(d) Screw press
7. Extraction of drugs using CO₂ belongs to one of the following categories of extraction
(a) Expression
(b) Leaching
(c) Liquid-liquid extraction
(d) Solid-liquid extraction
8. Leaching by immersion of crude material is also known as
(a) Expression
(b) Infusion
(c) Maceration
(d) Percolation
9. Which one of the following operations is a subsequent step to extraction in case of leaching
(a) Centrifugation
(b) Crystallization
(c) Drying
(d) Evaporation
10. In the Podbielniak extractor, agitation or mixing is aided by one of the following
(a) Baffles
(b) Centrifugal force
(c) Packing materials
(d) Stirrer
ANSWER KEY
| 1-d | 2-a | 3-b | 4-d | 5-d | 6-b | 7-d | 8-c | 9-d | 10-b |
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