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Supercritical fluid chromatography

Total questions: 10

Worksheet time: 6mins

Name
Class
Date
1.

Triple point in a phase daigram of the substance indicates

a)

two phases co-exist

b)

three phases co-exist

c)

single phase

2.

For SFC, the mobile phase must exist in this state

a)

critical

b)

subcritical

c)

supercritical

3.

Which is the best mobile phase for SFC

a)

ethane

b)

carbon dioxide

c)

ammonia

d)

n-hexane

4.

A substance can reach supercritical state by ______temperature beyond crtical pressure

a)

increasing

b)

decreasing

c)

retaining

5.

Supercritical fluids have properties ______gases and liquids.

a)

inbetween

b)

same as

c)

totally different than

6.

Density of supercritical fluids is close to that of a liquid

a)

True

b)

False

7.

____is generally added as a moderator in SFC

a)

Ethane

b)

carbon dioxide

c)

n-hexane

d)

methanol

8.

Which of these components not seen in HPLC

a)

precolumn

b)

back pressure regulator

c)

analytical column

d)

detector

9.

Viscosity of Super Critical Fluid is close to ___

a)

gases

b)

liquids

c)

solids

10.

In SFC stationary phase is non-polar

a)

True

b)

False