Gas Chromatography What are the benefits of decreasing the column internal diameter? Reduced risk of column overloading Increased resolution Increased sample capacity All of these Reduced risk of column overloading Increased resolution Increased sample capacity All of these ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What does the selectivity factor describe? The proportional difference in widths of two chromatographic peaks The relative separation achieved between two species The maximum number of different species which a column can separate simultaneously None of these The proportional difference in widths of two chromatographic peaks The relative separation achieved between two species The maximum number of different species which a column can separate simultaneously None of these ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Which of the following detectors give concentration-dependent signals? Thermal conductivity All of these Electron-capture detector Infra-red detector Thermal conductivity All of these Electron-capture detector Infra-red detector ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Theoretical plates are used to measure the distribution of the analyte between mobile and stationary phases estimate the efficiency of a column determine the thickness of the stationary phase None of these measure the distribution of the analyte between mobile and stationary phases estimate the efficiency of a column determine the thickness of the stationary phase None of these 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 Polysiloxanes Cyclodextrins Silica None are used as stationary phases Polysiloxanes Cyclodextrins Silica ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What does the retention factor, k', describe? The velocity of the mobile phase The distribution of an analyte between the stationary and the mobile phase All of these The migration rate of an analyte through a column The velocity of the mobile phase The distribution of an analyte between the stationary and the mobile phase All of these The migration rate of an analyte through a column ANSWER DOWNLOAD EXAMIANS APP
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