Chromatography

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

• compound
• mixture
• keratin
• chromatography

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

• density
• solubility
• gravity
• boiling point

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

• fastest
• slowest

The retention factor is used

• to zero the chromatography scale
• to identify unknown compounds in a sample
• to retain solvent
• as a starting tool for chromatography

The mobile phase in paper chromatography is typically a

• plasma
• solid
• gas
• liquid

Which forms of Chromatography use R_t values?
I paper chromatoraphy
II TLC
III HPLC
IV GC

• I and II
• III and IV
• II only
• III only

When using water as a solvent which type of molecule is likely  to have the highest  R_f value

• polar
• non-polar

What is chromatography?

• The process by which particles move from a region of higher concentration to lower concentration

• The process by which water is purified

• The method through which solutes are separated

Diffusion is non-existent in ___________?

• Liquids

• Gas

• Solids

• None of the above

Descending chromatography is favoured by ________________?

• Wind

• Air

• Gravity

• Length of Paper