
chromatography lec.2
Quiz
•
Chemistry
•
University
•
Hard
Riham Bakr
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6 questions
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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
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