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WorksheetsRf Values and Chromatography
Total questions: 20
Worksheet time: 12mins
CO₂
O₂
H₂O
C₆H₁₂O₆
Which pigment traveled the farthest based on this chromatogram?
Chlorophyll a
Chlorophyll b
Xanthophyll
Carotene
Which pigment in plants is responsible for absorbing most of the light energy for the plant?
Chlorophyll
Xanthophyll
Caretenoid
Anthocyanin
What does Rf stand for?
Retardation factor
Retention factor
Refracting factor
Retest factor
It is possible for an Rf value to be more than 1.
True
False
What is the Rf value of carotene?
0.96
0.50
0.33
1.09
What is correct order of least to most solubility of the samples ?
BAC
ABC
CAB
Need more information
What is the Rf value of sample A?
0.33
12
8
4
Which is true about the chromatogram?
Sample W has a lower Rf value than sample Z.
Sample W is more soluble than sample Z.
Sample W and sample Z have the same Rf values.
Rf values is a ratio and will not have a unit.
True
False
An Rf value nearer to 1 means that the sample is less soluble.
False
True
Which of the pigment moved the farthest?
Carotene
Xanthophyll
Chlorophyll a
Chlorophyll b
Which pigment is the least soluble in the chromatography solvent?
chlorophyll a
chlorophyll b
xanthophyll
carotene
Which pigment has the least Rf value?
chlorophyll a
chlorophyll b
xanthophyll
carotene
The pigment traveled a distance of 51 mm and the solvent traveled 98 mm on the filter paper. What is the Rf value?
0.52
0.99
0.73
0.38
What does a small Rf value mean?
The pigment is not very soluble in the solvent.
The pigment is very soluble in the solvent.
The pigment has bigger molecules.
The pigment has smaller molecules.
