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which of these statements below are true of thin layer chromatography? a. the mode of separation...

which of these statements below are true of thin layer chromatography?

a. the mode of separation is generally by absorption or partition
b. the more polar components are adsorbed preferentially by the polar layer
c. hydrogen bonding is the main force controlling adsorption between the silica gel surface and the analyte functional groups
d. silica gel with or without an added fluorescing indicator is most commonly used stationary phase in normal phase chromatography
e. all of the above

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