Chromatography Forensic Science

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

• 0

• 1

• 2

• 3

The substance in the mixture that has the greatest affinity for the stationary phase will travel

• fastest
• slowest

In paper chromatography (where the stationary phase is non-polar), the most soluble (polar) component _____________________ .

• 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

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

• B
• C
• D

What is chromatography?

• A way to see pretty colors

• A laboratory technique used to separate a mixture.

• A form of distillation

Two or more substances that are mixed together but not chemically combined create a...

• solvent

• compound

• mixture

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.