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- 1. Multiple ChoiceTwo or more substances that are mixed together but not chemically combined is a ___compoundmixturekeratinchromatography
- 2. Multiple ChoiceTwo or more substances that are chemically combined is a ___compoundmixturesolventsolute
- 3. Multiple Choice
Ink can be separated by a method of -----------------------------------------------
distillation
filtration
chromatography
sedimentation
- 4. Multiple Choicechromatography separates the mixture of dyes on the basis of their ----------------------------densitysolubilitygravityboiling point
- 5. Multiple ChoiceOn the chromatogram given -------------- is mixture.redorangegreenblack
- 6. Multiple Choice
A pure substance shows ------------------ spot on chromatogram
0
1
2
3
- 7. 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
- 8. Multiple Choice_________________ utilizes a stationary and a mobile phase to separate mixtures based on their affinity for each phase.filtrationchromatographydistillationosmosis
- 9. Multiple ChoiceThe mobile phase in paper chromatography is typically aplasmasolidgasliquid
- 10. Multiple ChoiceThe substance in the mixture that has the greatest affinity for the stationary phase will travelfastestslowest
- 11. Multiple ChoiceThe substance in the mixture that has the greatest affinity for the mobile phase will travelfastestslowest
- 12. Multiple ChoiceThe retention factor is usedto zero the chromatography scaleto identify unknown compounds in a sampleto retain solventas a starting tool for chromatography
- 13. Multiple ChoiceThe Rf value for the blue component is0.30.7103
- 14. Multiple ChoiceThe Rf value for the red component is0.30.7107
- 15. Multiple Choice
A substance is soluble if it can be dissolved.
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
- 16. Multiple Choice
What is the correct image of paper chromatography???
- 17. Multiple Choice
In the image, which dye is the most soluble?
Red
Blue
Purple
- 18. Multiple Choice
In the image, which dye has the largest retention factor (Rf)?
Red
Blue
Purple
- 19. Multiple Choice
In the image, which dye has the smallest retention factor (Rf)?
Red
Blue
Purple
- 20. Multiple Choice
What is the Rf value of the purple dye?
0.6
0.2
0.4
0.8
1.0
- 21. Multiple Choice
What is the Rf value of the blue dye?
0.6
0.2
0.4
0.8
1.0
- 22. Multiple Choice
What is the Rf value of the red dye?
0.6
0.2
0.4
0.8
1.0
- 23. Multiple ChoiceWhich plant species has plant pigments most similar to those in A?BCD
- Answer choicesTagsAnswer choicesTags