HPLC
Column efficiency is measured in terms of number of plates which is

directly related to the square of the peak width
directly related to the square of the peak width
inversely related to the square of the peak width
inversely related to the cube root of the peak width

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HPLC
HPLC methods include

All of these
liquid/solid (adsorption) chromatography
ion exchange and size exclusion chromatography
liquid/liquid (partition) chromatography

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HPLC
An eluotropic series

ranks column packing material by their relative abilities to retain solutes on the column
is a measure of the solvent adsorption energy
None of these
ranks solvents by their relative abilities to displace solutes from a given absorbent

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