Home⇒ Medical Science⇒ Biochemistry⇒ Gas chromatography
| 1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
| 2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
| Q1 ⇒ Which of the following detectors give concentration-dependent signals? All of these [other wrong options] [Discuss in forum] |
| Q2 ⇒ Headspace analysis is carried out in order to analyse volatile compounds from solid or liquid samples [other wrong options] [Discuss in forum] |
| Q3 ⇒ Column bleeding occurs when traces of the stationary phase are eluted [other wrong options] [Discuss in forum] |
| Q4 ⇒ Derivatisation of a sample is carried out to all of the above [other wrong options] [Discuss in forum] |
| Q5 ⇒ What does the selectivity factor describe? The relative separation achieved between two species [other wrong options] [Discuss in forum] |
| Q6 ⇒ Which of the following gases is unsuitable for use as a GC carrier gas? Oxygen [other wrong options] [Discuss in forum] |
| Q7 ⇒ What is the typical internal diameter of fused silica capillary columns? 0.2-0.3 mm [other wrong options] [Discuss in forum] |
| Q8 ⇒ What does the retention factor, k', describe? The migration rate of an analyte through a column [other wrong options] [Discuss in forum] |
| Q9 ⇒ Doubling the column's length increases resolution by a factor of (2)0.5 [other wrong options] [Discuss in forum] |
| Q10 ⇒ The GC trace obtained after an experiment is called a chromatogram [other wrong options] [Discuss in forum] |
| Q11 ⇒ Which of the following detectors give mass flow-dependent signals? Field ionisation detector [other wrong options] [Discuss in forum] |
| Q12 ⇒ Sample retention in the column is measured by all of these [other wrong options] [Discuss in forum] |
| Q13 ⇒ Which of the following is not used for detection in GC? NMR [other wrong options] [Discuss in forum] |
| Q14 ⇒ In column switching chromatography compounds trapped on one column are eluted to another column [other wrong options] [Discuss in forum] |
| Q15 ⇒ The column is heated to all of these [other wrong options] [Discuss in forum] |
| Q16 ⇒ Resolution is proportional to the square root of the number of theoretical plates in a column [other wrong options] [Discuss in forum] |
| Q17 ⇒ Theoretical plates are used to estimate the efficiency of a column [other wrong options] [Discuss in forum] |
| Q18 ⇒ Sample injection is considered successful if the sample is concentrated at the start of the column [other wrong options] [Discuss in forum] |
| Q19 ⇒ Which of these effects result from slow injection of a large sample volume? Decreased resolution [other wrong options] [Discuss in forum] |
| Q20 ⇒ A retention gap is placed between the injector and the front of the column to retain contaminants and prevent them from reaching the column [other wrong options] [Discuss in forum] |
| Or |