Gas Chromatography
What does the selectivity factor describe?

The relative separation achieved between two species
None of these
The maximum number of different species which a column can separate simultaneously
The proportional difference in widths of two chromatographic peaks

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Gas Chromatography
Resolution is proportional to the

square of the number of theoretical plates in a column
cube root of the number of theoretical plates in a column
square root of the number of theoretical plates in a column
number of theoretical plates in a column

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Gas Chromatography
Column bleeding occurs when

the column breaks during installation and causes personal injury
elution of the analyte is extended over time
traces of the stationary phase are eluted
the column is cracked and stationary phase leaks out

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Gas Chromatography
Sample injection is considered successful if

all of the sample in the injector has been added to the column
the sample is concentrated at the start of the column
the sample is spread evenly along the column
the sample is homogenously spread along the column

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