Gas Chromatography Which of the following detectors give concentration-dependent signals? Electron-capture detector All of these Thermal conductivity Infra-red detector Electron-capture detector All of these Thermal conductivity Infra-red detector ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What does the selectivity factor describe? 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 The proportional difference in widths of two chromatographic peaks ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What are the benefits of decreasing the column internal diameter? Reduced risk of column overloading Increased sample capacity All of these Increased resolution Reduced risk of column overloading Increased sample capacity All of these Increased resolution ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What is the typical internal diameter of fused silica capillary columns? 0.2-0.3 mm 0.3-0.5mm 0.5-1.0 mm 1.0-2.0 mm 0.2-0.3 mm 0.3-0.5mm 0.5-1.0 mm 1.0-2.0 mm 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
Gas Chromatography Which of the following detectors give mass flow-dependent signals? Thermal conductivity detector All of these Field ionisation detector Electron capture detector Thermal conductivity detector All of these Field ionisation detector Electron capture detector ANSWER DOWNLOAD EXAMIANS APP
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