Chromatography Exam

The physical separation of mixtures into individual components is..

• chromatography
• opacity 
• latent
• trace evidence 

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

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

• red
• orange
• green
• black

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 chromatography?

• A way to see pretty colors

• A laboratory technique used to separate a mixture.

• A form of distillation

What molecules move up the paper to carry the different colors of ink?

• color

• fat

• water

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 is Chromatography useful?

• It can be used as medicine.
• It can be used for finding clues at a crime scene
• It can be used to make bombs.
• It can reduce the lack of food and water.

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