Chromatography

Substance T is used as a solvent to test the purity of substance in chromatography. The result is shown in the diagram. Which are substance is suitable for using Substance T as a solvent?

• A and B

• B and C

• D and E

• only E

The physical separation of mixtures into individual components is..

• chromatography

• paper chromatography

• locating agent

• chromatogram

chromatography separates the mixture of dyes on the basis of their ----------------------------

• density
• solubility
• gravity
• boiling point

A pure substance shows ------------------ spot on chromatogram

• 0

• 1

• 2

• 3

Water (polar solvent) is used as a solvent in this chromatography. Which is correct statement?

• A is a non-polar compound

• B is a non-polar compound

• A and B are semi-polar compound

• A and B are polar compound

Which is statement is not true about locating agent?

• Produce color spots on a chromatogram

• Change the Rf value of a substance

• Ninhydrin is an example of locating agent

• Allows colorless substances to be seen

Locating agents are used to make colorless compounds visible on a chromatogram

• True

• False

M is a harmful food coloring. Which one is not safe to consume?

• 1

• 2

• 3

• all compound are safe

The mobile phase in this experiment is...

• chromatography paper

• solvent

• beaker

• dye

The stationary phase in this experiment is...

• chromatography paper

• solvent

• beaker

• dye