1) Which orange squash contains all 3 substances? a) 1 b) 2 c) 3 d) none 2) Which substance is the least soluble? a) Tartrazine b) Carotene c) Natural orange 3) Which substance is the most soluble? a) Tartrazine b) Carotene c) Natural orange 4) Which orange squash contains carotene? a) 1 b) 2 c) 3 5) Which orange squash contains Tartrazine? a) 1 b) 2 c) 3 6) Which Orange squash contains natural orange? a) 1 b) 2 c) 3 7) What is the Rf equation? a) Distance moved by solvent / distance moved by substance  b) Distance moved by substance/ distance moved by solvent 8) What should your Rf value be less than? a) 0 b) 1 c) 10 9) What part of the spot should you use? a) Bottom b) Middle c) Top 10) What is the Rf value for s? a) 0.85 b) 1.17 11) The image when dried for analysis is called a ? a) Chromatography photo b) Chromaty c) Chromosome d) Chromatogram 12) What is the stationary phase? a) Starting line b) Solvent c) Chromatography paper 13) What is the mobile phase? a) Ink b) Solvent c) Chromatography paper

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