paper chromatography

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

• distillation

• filtration

• chromatography

• sedimentation

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

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

What is the correct image of paper chromatography???

• 
• 
• 

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

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

Figure below shows a chromatogram obtained from a police investigation. Which suspect A, B, C or D is most likely to have been at the crime scene?

• SUSPECT A

• SUSPECT B

• SUSPECT C

• SUSPECT D

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

When using paper chromatography, two phases are involved. They are the

• stationary and mobile phases

• solid phase and liquid phase

• gaseous phase and mobile phase

• constituent phases and analyte phase