HPLC
For a typical adsorbent such as silica gel, the most popular pore diameters are

10 and 50 A°
100 and 150 A°
150 and 200 A°
60 and 100 A°

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HPLC
An eluotropic series

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

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HPLC
Dwell volume is defined as

the volume of solvent contained in a liquid chromatographic column
the volume of the column between the point at which solvents are mixed and the beginning of the column
none of these
the time required for the gradient to reach the column

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HPLC
Void volume refers to the

the volume of solvent contained in a liquid chromatographic column
the time required for the gradient to reach the column
the volume of the column between the point at which solvents are mixed and the beginning of the column
total volume of eluent in the column the remainder being taken up by the packing material

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