Chromatography

Chromatography

Color mixing

Open Ended

What are 3 primary colors?

Open Ended

What color is formed when you mix yellow and blue together

How to separate Green into blue + yellow?

• Check out with this experiment 

Multiple Choice

Ink can be separated by a method of -----------------------------------------------

• distillation

• filtration

• chromatography

• sedimentation

Multiple Choice

Which of the following mixture/s is/are separated by chromatography?

• Pigments from natural colours

• Colours in a dye

• Colours of flowers extracts

• All the above

Multiple Choice

What is the correct image of paper chromatography???

Multiple Choice

The mobile phase in this experiment is...

• chromatography paper

• water

• beaker

• dye

Multiple Choice

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

• density
• solubility
• gravity
• boiling point

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

Multiple Choice

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

Multiple Choice

A pure substance shows ------------------ spot on chromat gram

• 0
• 1
• 2
• 3

Multiple Choice

On the chromatogram given -------------- is mixture.

• red
• orange
• green
• black

Multiple Choice

The dye with the HIGHEST Rf value will be...

• Dye 1

• Dye 2

• Dye 3

• All have the same Rf value

Multiple Choice

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

Multiple Choice

The mixture on the left contains...

• All three dyes

• None of the dyes

• Dye 1 and Dye 2

• Dye 1 and Dye 3

• Dye 2 and Dye 3

Multiple Choice

Why 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 water
• c) Pencil is insoluble in water
• d) Pencil is not coloured

Multiple Choice

The R_f value  for the red component is 

• 0.3
• 0.7
• 10
• 7

Multiple Choice

The R_f value  for the blue component is 

• 0.3
• 0.7
• 10
• 3

Multiple Choice

The stationary phase in this experiment is...

• chromatography paper

• water

• beaker

• dye

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

Multiple Choice

Which of the following is correct about chromatography?

• It separates those solutes that dissolve in the same solvent.

• It separates those solutes that dissolve in different solvents.

• It separates a solute that dissolves in a solid solvent.

• It separates gaseous solutes from liquid solvents.

Multiple Choice

Which plant species has plant pigments most similar to those in A?

• B
• C
• D

Multiple Choice

A pure substance shows ------------------ spot on chromat gram

• 0
• 1
• 2
• 3