Thin-Layer Chromatography Quiz

What is the general trend in elution based on polarity?

• The more nonpolar the compound, the faster it will elute.

• The more polar the compound, the slower it will elute.

• Both statements are true.

• Both statements are false.

What is the Rf value in chromatography?

• The distance the solvent travels divided by the distance the spot travels.

• The distance the spot travels divided by the distance the solvent travels.

• The ratio of the solvent to the sample.

• None of the above.

What should be used to mark a TLC plate?

• Ink

• Pencil

• Marker

• None of the above

What is the purpose of the development chamber in TLC?

• To create an atmosphere saturated with solvent.

• To dry the TLC plate.

• To cool the solvent.

• To mix the sample.

What happens if too much solute is added to the TLC plate?

• A good separation will result.

• Smearing and overlapping spots will occur.

• The spots will disappear.

• None of the above.

What is the significance of the Rf value?

• It helps identify the compound.

• It indicates the polarity of the compound.

• It is not significant.

• It is only significant under certain conditions.