Question: Column efficiency is measured in terms of number of plates which is [A]. inversely related to the square of the peak width [B]. directly related to the square of the peak width [C]. inversely related to the cube root…

Question: For a typical adsorbent such as silica gel, the most popular pore diameters are [A]. 10 and 50 A° [B]. 60 and 100 A° [C]. 100 and 150 A° [D]. 150 and 200 A° Answer: Option B Explanation: No…

Question: Dwell volume is defined as [A]. the volume of solvent contained in a liquid chromatographic column [B]. the time required for the gradient to reach the column [C]. the volume of the column between the point at which solvents…

Question: An eluotropic series [A]. ranks solvents by their relative abilities to displace solutes from a given absorbent [B]. ranks column packing material by their relative abilities to retain solutes on the column [C]. is a measure of the solvent…

Question: Which of the following statements is true for a refractive index detector in HPLC? [A]. It is more sensitive than a UV detector [B]. It can only be used for isocratic elutions [C]. It does not respond to many…

Question: A gradient elution in HPLC is one in which the composition of the solvent [A]. remains constant [B]. is changed continuously or in a series of steps [C]. both (a) and (b) [D]. none of the above Answer: Option…

Question: An isocratic elution in HPLC is one in which the composition of the solvent [A]. remains constant [B]. changes continuously [C]. changes in a series of steps [D]. none of these Answer: Option A Explanation: No answer description available…

Question: In reversed phase HPLC, there is a [A]. non polar solvent/polar column [B]. polar solvent/non-polar column [C]. non polar solvent/non-polar column [D]. any of the above Answer: Option B Explanation: No answer description available for this question.

Question: In normal phase HPLC, there is a [A]. non polar solvent/polar column [B]. polar solvent/non-polar column [C]. non polar solvent/non-polar column [D]. any of the above Answer: Option A Explanation: No answer description available for this question.

Question: Which of the following(s) is/are the advantage of HPLC over traditional LPLC (low-pressure liquid chromatography)? [A]. Greater sensitivity and reusable columns [B]. Ideal for ionic species and large molecules [C]. Sample recovery [D]. All of the above Answer: Option…