chromatography lec.2

chromatography lec.2

University

6 Qs

quiz-placeholder

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chromatography lec.2

chromatography lec.2

Assessment

Quiz

Chemistry

University

Hard

Created by

Riham Bakr

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6 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The substance in the mixture that has the greatest affinity for the mobile phase will travel

fastest

slowest

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The retention factor is used

to retain solvent

to identify uknown compounds in a sample

as a starting tool for chromatography

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The larger "K" value denotes

Faster separation

slower separation

higher concentration in the mobile phase

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A high Rf and low Rt means that the compound has

greater affinity to the stationary phase

greater affinity to the mobile phase

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

mobile phase that  has more affinity to the adsorbent  than the solvent but less than the  solutes (it allows the solutes to  move)

solvent

developer

eluent

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

It has more eluting power than  the developer and can take  solutes out of the surface of the  adsorbent.

solvent

developer

eluent