1) Chromatography may be used to separate mixtures of amino acids. This is best explained by the fact that different amino acids have different interactions with a) the mobile phase only. b) the stationary phase only. c) the mobile phase and the stationary phase.. d) ninhydrin. 2) The distance on a chromatogram moved by an individual amino acid, in a mixture of a) the molar mass of the amino acid. b) the molar mass of the solvent used. c) the intermolecular forces between the solvent and the stationary phase. d) the intermolecular forces between the amino acid and both the solvent and the stationary phase. 3) The distance on a chromatogram moved by an individual amino acid, in a mixture of different amino acids, mainly depends on a) reacts with amino acids to form a compound which has an intense colour. b) eacts with amino acids to form compounds each of which has a characteristic colour. c) increases the separation of the amino acids on the chromatogram. d)  ensures that the mobile phase maintains a nearly constant pH for all the amino acids.

Chromatography

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