Revision - Chromatography

A hydrophobic compound will preferentially partition into an aqueous solvent. True or false?

• True

• False

Chromatography is a physical method that is used to separate and analyse _____________.

• Pure compounds

• Complex mixtures

• Viscous mixtures

• Metals

The process of passing a mobile phase through a chromatography column is called which one of the following?

• Flushing

• Washing

• Elution

• Partitioning

In which type of chromatography, the stationary phase held in a narrow glass tube and the mobile phase is forced through it under pressure?

• Column chromatography

• Planar chromatography

• Liquid chromatography

• Gas chromatography

In chromatography, which of the following can the mobile phase be made of?

• Solid or liquid

• Liquid or gas

• Gas only

• Liquid only

A thin layer chromatography (TLC) plate was set up with a non-polar solvent, hexane, and a polar stationary phase, silica gel. The chromatogram below was obtained. A ruler was then placed next to the plate. Calcualte the Rf value for the compound.

• 0.80

• 0.78

• 0.64

• 0.61

Which of the following types of chromatography involves the process, where the mobile phase moves through the stationary phase by the influence of gravity or capillary action?

• Column Chromatography

• High Performance Liquid Chromatography

• Gas Chromatography

• Planar Chromatography

Which of the following cannot be used as an adsorbent in Column adsorption chromatography?

• Magnesium oxide

• Silica gel

• Activated alumina

• Potassium permanganate

In Gas-liquid phase chromatography, the stationary phase is composed of _________ and the mobile phase is made of _________

• Solid, liquid

• Liquid, liquid

• Liquid, gas

• Solid, gas

Four straight chain alchohols, S, T, U, V, with a general formula ROH, were analysed using a gas chromatograph combined with a mass spectrometer. The following chromatogram was produced.

• V, U, T, S

• T, U, S, V

• V, S, U, T

• S, T, U, V