HPLC
An isocratic elution in HPLC is one in which the composition of the solvent

none of these
remains constant
changes continuously
changes in a series of steps

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HPLC
An eluotropic series

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

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HPLC
HPLC stands for

High Performance Liquid Chromatography
High Pressure Liquid Chromatography
Highly Placed Liquid Chromatography
both (a) and (b)

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HPLC
HPLC methods include

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

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