Gas Chromatography In column switching chromatography any of the above compounds trapped on one column are eluted to another column one column is removed and replaced by another the flow to the column is switched on and off repeatedly any of the above compounds trapped on one column are eluted to another column one column is removed and replaced by another the flow to the column is switched on and off repeatedly ANSWER DOWNLOAD EXAMIANS APP
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 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 ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What useful information can be found from a Van Deemter plot? Optimum column temperature Optimum mobile phase flow rate The selectivity factor Optimum column length Optimum column temperature Optimum mobile phase flow rate The selectivity factor Optimum column length ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Which of the following detectors give concentration-dependent signals? Thermal conductivity All of these Infra-red detector Electron-capture detector Thermal conductivity All of these Infra-red detector Electron-capture detector ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Which of these effects result from slow injection of a large sample volume? Constant resolution Non-linear detector response Decreased resolution Increased resolution Constant resolution Non-linear detector response Decreased resolution Increased resolution ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Which of the following gases is unsuitable for use as a GC carrier gas? Helium Oxygen All of these Nitrogen Helium Oxygen All of these Nitrogen ANSWER DOWNLOAD EXAMIANS APP
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