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Quiz 1

Authored by NIK DAUD

Chemistry

University

Used 3+ times

Quiz 1
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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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