
Quiz 1
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Chemistry
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University
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NIK DAUD
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
......................... is the most used supercritical fluid
Water
Methane
Carbon dioxide (CO2)
Ethanol
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
........................... separates an analyte through partitioning between two immiscible solvents
SE
Liquid-liquid extraction (LLE)
SFE
SPE
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In liquid-liquid extraction, if the selectivity is unity, then
(a) separation of the constituents is most effective
(b) no separation is possible
(c) amount of solvent requirement is minimum
(d) solvent flow rate should be very high
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following operations is more economical for concentration of acetic acid from very dilute aqueous solution?
(a) evaporation
(b) solvent extraction
(c) atmospheric distillation
(d) drying
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The temperature of a supercritical fluid should be above its
(a) freezing point
(b) boiling point
(c) critical point
(d) none of these
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Heat sensitive material with very high latent heat of vaporisation may be economically separated by
(a) distillation
(b) evaporation
(c) liquid extraction
(d) absorption
7.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
.......is a technique performed to extract solid or semi-solid samples using organic solvents.
Supercritical Fluids Extraction
Pressurized Fluids Extraction
Soxhlet Extraction
Enzymatic Assisted Extarction
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