Extraction MCQs : This section focuses on the "Extraction". These Multiple Choice Questions (MCQs) should be practiced to improve the Extraction skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
Question 1
_____ is an important solvent for wet and edible materials.
A. Hexane
B. Acetone
C. Chloroform
D. All of the mentioned
Question 2
_____ is the diagonal of the x-y diagram.
A. Operating line
B. Equilibrium line
C. Equilibrium curve
D. None of the mentioned
Question 3
A multi stage continuous counter-current extractor has the advantages of both co and counter current processes.
A. TRUE
B. FALSE
Question 4
After extraction via solvent extraction, the cake serves to be a good source of _____
A. Fats
B. Proteins
C. Carbohydrates
D. Fibers
Question 5
If extraction is done at the _____ of the solvent, it is called _____
A. Melting point, decoction
B. Boiling point, decoction
C. Melting point, leaching
D. Boiling point, leaching
Question 6
Liquid-liquid extraction is called leaching.
A. TRUE
B. FALSE
Question 7
Multi-stage counter-current extraction is expensive as more extractors are needed to strip the solid off the solvent.
A. TRUE
B. FALSE
Question 8
Statement 1: Caffeine is the active principle in coffee. It cannot be stripped off it.
A. True, False
B. True, True
C. False, False
D. False, True
Question 9
Using hot water for decoction followed by spraying drying is the procedure used for making instant coffee.
A. TRUE
B. FALSE
Question 10
What is extraction in paprika used for?
A. Obtain proteins from the end product
B. Desolventization of final product
C. Extraction of its natural color
D. All of the mentioned
Question 11
Which among the following factors does NOT affect extraction?
A. Solubility of solute in the solvent
B. Degree of agitation
C. Concentration difference
D. None of the mentioned
Question 12
Which of the following is a major constraint of SCFE?
A. Maintaining temperature of order 100deg C
B. Channeling of fluid in extraction tank without contacting the solids
C. Maintenance of high pressure
D. All of the mentioned
Question 13
Which of the following is the actual reason why CO2 is used in CSFE?
A. All of the mentioned
B. No serious health risks detected so far
C. Inexpensive and readily available in pure form
D. Inert, doesn't react with solute
Question 14
Which of the following is the real extraction application of SCFE?
A. Cholesterol from egg
B. Nicotine from tobacco
C. Cholesterol from egg & Nicotine from tobacco
D. None of the mentioned
Question 15
Which of the following operations is carried out by extraction equipment?
A. Leaving as little solvent as possible in the spent cake
B. Bringing intimate contact between solute and solvent
C. Leaching solute out as quick as possible by letting solute diffuse into the solvent from porous structure of solids
D. All of the mentioned