Chromatography Basics

Two or more substances that are mixed together but not chemically combined is a ___

• compound
• mixture
• keratin
• chromatography

Two or more substances that are chemically combined is a ___

• compound
• mixture
• solvent
• solute

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 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

_________________ utilizes a stationary and a mobile phase to separate mixtures based on their affinity for each phase.

• filtration
• chromatography
• distillation
• osmosis

The mobile phase in paper chromatography is typically a

• plasma
• solid
• gas
• liquid

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

• fastest
• slowest