Paper Chromatography

On the chromatogram given, ________ dye is a mixture.

• red

• orange

• green

• black

The 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 only

• S only

• P and S

• P and X

Tags

NGSS.MS-PS1-2

Dyes in water soluble markers may be separated by means of ________.

• crystallization

• sublimation

• chromatography

• sedimentation

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.

Tags

NGSS.MS-ETS1-1

Chromatography separates a mixture of dyes on the basis of their _______.

• density

• solubility

• gravity

• boiling point

A pure substance shows _____ spot on the chromatogram.

• 0

• 1

• 2

• 3

If a substance is not soluble in the solvent, what happens to the spot placed on the start line?

• Dot moves to the top of the paper

• Dot does not move at all

• Dot moves to the left or right

• Dot moves down to the bottom of the paper

In chromatography, if a solute does not separate and remains on the start line ....

• the solute is insoluble in the solvent

• the solute is soluble in the solvent

• the solvent is insoluble in the solute

• the solvent is soluble in the solute

If 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 instead

• Repeat the chromatography test using a different solvent such as propanone

• Use distillation instead

• Repeat the chromatography using water as the solvent and see if it separates this time

Hey Zoe! In the exciting world of paper chromatography, can you guess what the solvent does?

• To hold the paper in place

• To dissolve the sample and carry it up the paper

• To measure the temperature

• To create a vacuum