1) What does chromatography separate? a) Insoluble substances in a solution b) Soluble substances in solution 2) In chromatography what is the base line drawn in? a) Pencil b) Pen c) Marker 3) Where should the base line be compared to the solvent? a) Level b) Below c) Above 4) What is the stationary phase? a) Beaker b) Chromatography paper c) Base line 5) What is the mobile phase? a) Solvent b) Substance 6) Which orange squash contains all 3 substances? a) 1 b) 2 c) 3 d) none 7) Which substance is the least soluble? a) Tartrazine b) Carotene c) Natural orange 8) Which orange squash contains Tartrazine? a) 1 b) 2 c) 3 9) What is the Rf value for s? a) 0.83 b) 0.85 c) 1.2 d) 1.17

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