Q. Helium is generally preferred as carrier gas over nitrogen and hydrogen because

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Q. What does the selectivity factor describe?

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Q. Theoretical plates are used to

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Q. Sample injection is considered successful if

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Q. Doubling the column's length increases resolution by a factor of

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Q. Which of the following are not used as stationary phases in a GC column?

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Q. Column bleeding occurs when

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Q. Sample retention in the column is measured by

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Q. What useful information can be found from a Van Deemter plot?

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Q. Which of the following detectors give concentration-dependent signals?

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Q. The GC trace obtained after an experiment is called a

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Q. Which of these effects result from slow injection of a large sample volume?

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Q. Which of the following is not used for detection in GC?

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Q. Which of the following gases is unsuitable for use as a GC carrier gas?

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Q. In column switching chromatography

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Q. Which of the statements is correct?

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Q. Derivatisation of a sample is carried out to

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Q. Resolution is proportional to the

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Q. What is the typical internal diameter of fused silica capillary columns?

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Q. Negative staining is a technique used in

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