Gas Chromatography What is the typical internal diameter of fused silica capillary columns? 1.0-2.0 mm 0.3-0.5mm 0.2-0.3 mm 0.5-1.0 mm 1.0-2.0 mm 0.3-0.5mm 0.2-0.3 mm 0.5-1.0 mm ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography In column switching chromatography any of the above the flow to the column is switched on and off repeatedly one column is removed and replaced by another compounds trapped on one column are eluted to another column any of the above the flow to the column is switched on and off repeatedly one column is removed and replaced by another compounds trapped on one column are eluted to another column ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Which of the following detectors give mass flow-dependent signals? Field ionisation detector Electron capture detector Thermal conductivity detector All of these Field ionisation detector Electron capture detector Thermal conductivity detector All 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 Silica Polysiloxanes Cyclodextrins None are used as stationary phases Silica Polysiloxanes Cyclodextrins ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography The column is heated to prevent analyte condensation within the column reduce band broadening to get sharper peaks all of these control elution of the different analytes prevent analyte condensation within the column reduce band broadening to get sharper peaks all of these control elution of the different analytes ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What does the selectivity factor describe? 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 The relative separation achieved between two species The maximum number of different species which a column can separate simultaneously ANSWER DOWNLOAD EXAMIANS APP
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