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15 questions
Chromatography separates a mixture of dyes on the basis of their _______.
density
solubility
gravity
boiling point
On the chromatogram given, ________ dye is a mixture.
red
orange
green
black
A pure substance shows _____ spot on the chromatogram.
0
1
2
3
Dyes in water soluble markers may be separated by means of ________.
crystallization
sublimation
chromatography
sedimentation
What is chromatography?
A way to see pretty colors
A laboratory technique used to separate a mixture.
A form of distillation
If a substance is not soluble in the solvent, what happens to the spot placed on the start line?
a) Dot moves to the top of the paper
b) Dot does not move at all
c) Dot moves to the left or right
d) Dot moves down to the bottom of the paper
In paper chromatography, the MOST soluble solute ______,
does not move from the start point
stays closest to the start point
travels furthest away from the start point
can be found in the middle of the chromatogram
In paper chromatography, the LEAST soluble solute ____.
does not move from the start point
stays closest to the start point
travels furthest away from the start point
can be found in the middle of the chromatogram
Why is only a small amount of ink/dye placed on the starting line on the chromatography paper?
So as to prevent overlapping.
So as not to waste the ink/dye.
None of the above.
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