Other questions in this quiz

2. Which is NOT a limitation of thin layer chromatography?

  • similar compounds have similar retention times
  • may be difficult to find a solvent which will separate all components
  • similar compounds have similar Rf values
  • unknown compounds have no Rf value for comparison

3. What is the definition of retention time?

  • the time taken for a particular compound to travel through the column to the detector, from injection to leaving the column
  • distance moved by component divided by distance moved my solvent front
  • the time taken for a particular compound to dissolve in the stationary phase
  • the time taken for the gas to be injected into the column and dissolve in the stationary phase

4. What does a solid stationary phase separate compounds by?

  • adsorption
  • absorption
  • relative solubility

5. Which is NOT a limitation of gas chromatography?

  • substances have the same retention times
  • unknown compounds have no reference Rf value
  • substances can 'hide' beneath each other so will not be detected
  • unknown compounds have no reference retention time

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all Spectroscopy resources »