Explain stay absorbed to the silica gel and not move

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1.) During TLC, if a solvent of too low polarity is used; the components will stay absorbed to the silica gel and not move from the starting point. Why does this occur? 2.)During TLC, if the solvent polarity is too high; the components in the mixture would dissolve readily in the solvent and travel with the solvent front. Why does this occur?

Reference no: EM13493360

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