HPLC
A gradient elution in HPLC is one in which the composition of the solvent

is changed continuously or in a series of steps
None of these
both (a) and (b)
remains constant

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HPLC
HPLC methods include

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

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HPLC
HPLC stands for

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

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

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

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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
ranks solvents by their relative abilities to displace solutes from a given absorbent
None of these

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