HPLC Interview Questions & Answers
Best HPCL Interview Questions and Answers
Dear Readers, Welcome to HPLC Objective Questions and Answers have been designed specially to get you acquainted with the nature of questions you may encounter during your Job interview for the subject of HPLC Multiple choice Questions. These Objective type HPLC Questions are very important for campus placement test and job interviews. As per my experience good interviewers hardly plan to ask any particular question during your Job interview and these model questions are asked in the online technical test and interview of many Medical Industry.
1. HPLC stands for
A. High Pressure Liquid Chromatography
B. High Performance Liquid Chromatography
C. both (a) and (b)
D. Highly Placed Liquid Chromatography
Answer: C
2. The eluent strength is a measure of
A. solvent adsorption energy
B. solvent absorption energy
C. solvent diffusivity
D. solvent mixing index
Answer: A
3. HPLC methods include
A. liquid/liquid (partition) chromatography
B. liquid/solid (adsorption) chromatography
C. ion exchange and size exclusion chromatography
D. all of the above
Answer: D
4. 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 of the peak width
D. directly related to the square of the peak width
Answer: A
5. 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: B
6. 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: A
7. 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: B
8. 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 solutes
D. none of above
Answer: C
9. 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: B
10. 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 adsorption energy
D. none of the above
Answer: A
11. 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 are mixed and the beginning of the column
D. none of these
Answer: C
12. Void volume refers to the
A. total volume of eluent in the column the remainder being taken up by the packing material
B. the volume of solvent contained in a liquid chromatographic column
C. the time required for the gradient to reach the column
D. the volume of the column between the point at which solvents are mixed and the beginning of the column
Answer: A
13. 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: A
14. 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: D
15. Which can be used as a mobile phase in HPLC applications?
A. Any compound with solubility in liquid
B. Any compound with limited solubility in liquid
C. Any compound with non-solubility in liquid
D. Any of the above
Answer: A