Gas Chromatography Which of the following is not used for detection in GC? Infrared spectroscopy NMR Flame ionisation Electrical conductivity Infrared spectroscopy NMR Flame ionisation Electrical conductivity ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Which of the following detectors give concentration-dependent signals? Electron-capture detector Infra-red detector All of these Thermal conductivity Electron-capture detector Infra-red detector All of these Thermal conductivity ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Doubling the column's length increases resolution by a factor of 4 (2)0.5 2 3 4 (2)0.5 2 3 ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What useful information can be found from a Van Deemter plot? Optimum column temperature Optimum column length The selectivity factor Optimum mobile phase flow rate Optimum column temperature Optimum column length The selectivity factor Optimum mobile phase flow rate ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Theoretical plates are used to estimate the efficiency of a column None of these determine the thickness of the stationary phase measure the distribution of the analyte between mobile and stationary phases estimate the efficiency of a column None of these determine the thickness of the stationary phase measure the distribution of the analyte between mobile and stationary phases ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Sample injection is considered successful if the sample is spread evenly along the column the sample is homogenously spread along the column the sample is concentrated at the start of the column all of the sample in the injector has been added to the column the sample is spread evenly along the column the sample is homogenously spread along the column the sample is concentrated at the start of the column all of the sample in the injector has been added to the column ANSWER DOWNLOAD EXAMIANS APP
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