Gas Chromatography In column switching chromatography compounds trapped on one column are eluted to another column the flow to the column is switched on and off repeatedly one column is removed and replaced by another any of the above compounds trapped on one column are eluted to another column the flow to the column is switched on and off repeatedly one column is removed and replaced by another any of the above ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What does the selectivity factor describe? The proportional difference in widths of two chromatographic peaks The maximum number of different species which a column can separate simultaneously The relative separation achieved between two species None of these The proportional difference in widths of two chromatographic peaks The maximum number of different species which a column can separate simultaneously The relative separation achieved between two species None of these ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Which of the following detectors give concentration-dependent signals? Infra-red detector Thermal conductivity All of these Electron-capture detector Infra-red detector Thermal conductivity All of these Electron-capture detector ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography The column is heated to prevent analyte condensation within the column control elution of the different analytes all of these reduce band broadening to get sharper peaks prevent analyte condensation within the column control elution of the different analytes all of these reduce band broadening to get sharper peaks ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What are the benefits of decreasing the column internal diameter? All of these Increased resolution Increased sample capacity Reduced risk of column overloading All of these Increased resolution Increased sample capacity Reduced risk of column overloading ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Which of the following are not used as stationary phases in a GC column? None are used as stationary phases Cyclodextrins Polysiloxanes Silica None are used as stationary phases Cyclodextrins Polysiloxanes Silica ANSWER DOWNLOAD EXAMIANS APP
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