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- 1. Multiple Choice
Chromatography separates a mixture of dyes on the basis of their _______.
density
solubility
gravity
boiling point
- 2. Multiple Choice
On the chromatogram given, ________ dye is a mixture.
red
orange
green
black
- 3. Multiple Choice
A pure substance shows _____ spot on the chromatogram.
0
1
2
3
- 4. Multiple ChoiceThe diagram below shows a chromatogram obtained when a sample X was analysed together with four other known dyes P, Q, R and S. Dye Q was known to cause cancer. Which of the following dye(s) is/are safe for use?P onlyS onlyP and SP and X
- 5. Multiple Choice
Dyes in water soluble markers may be separated by means of ________.
crystallization
sublimation
chromatography
sedimentation
- 6. Multiple ChoiceWhich plant species has plant pigments most similar to those in A?BCD
- 7. Multiple Choice
What is chromatography?
A way to see pretty colors
A laboratory technique used to separate a mixture.
A form of distillation
- 8. Multiple ChoiceWhy is Chromatography useful?It can be used as medicine.It can be used for finding clues at a crime sceneIt can be used to make bombs.It can reduce the lack of food and water.
- 9. Multiple ChoiceWhy must the base line be drawn in pencil and not pen?a) Pencil is good at keeping substances in place.b) Pencil is soluble in waterc) Pencil is insoluble in waterd) Pencil is not coloured
- 10. Multiple Choice
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
- 11. Multiple Choice
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
- 12. Multiple Choice
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
- 13. Multiple ChoiceIn chromatography, if a solute does not separate and remains on the start line ....the solute is insoluble in the solventthe solute is soluble in the solventthe solvent is insoluble in the solutethe solvent is soluble in the solute
- 14. Multiple ChoiceIf a dye is insoluble in water and cannot be separated using chromatography, how can it be tested to see if it is a mixture?Use filtration insteadRepeat the chromatography test using a different solvent such as propanoneUse distillation insteadRepeat the chromatography using water as the solvent and see if it separates this time
- 15. Multiple Choice
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.
- Answer choicesTagsAnswer choicesTags