Gas Chromatography Which of the following gases is unsuitable for use as a GC carrier gas? Nitrogen Oxygen Helium All of these Nitrogen Oxygen Helium All of these ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What does the selectivity factor describe? 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 The proportional difference in widths of two chromatographic peaks ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Which of the following are not used as stationary phases in a GC column? Cyclodextrins Polysiloxanes Silica None are used as stationary phases Cyclodextrins Polysiloxanes Silica None are used as stationary phases ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography A retention gap is placed between the injector and the front of the column to All of these retain contaminants and prevent them from reaching the column retain the sample and release it gradually to the column prevent backflush of the injected solution All of these retain contaminants and prevent them from reaching the column retain the sample and release it gradually to the column prevent backflush of the injected solution ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Which of the following detectors give mass flow-dependent signals? Electron capture detector All of these Field ionisation detector Thermal conductivity detector Electron capture detector All of these Field ionisation detector Thermal conductivity detector ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Which of the following detectors give concentration-dependent signals? Thermal conductivity Electron-capture detector Infra-red detector All of these Thermal conductivity Electron-capture detector Infra-red detector All of these ANSWER DOWNLOAD EXAMIANS APP
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