Gas Chromatography Which of the following is not used for detection in GC? Infrared spectroscopy NMR Electrical conductivity Flame ionisation Infrared spectroscopy NMR Electrical conductivity Flame ionisation ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Sample injection is considered successful if the sample is homogenously spread along the column the sample is concentrated at the start of the column the sample is spread evenly along the column all of the sample in the injector has been added to the column the sample is homogenously spread along the column the sample is concentrated at the start of the column the sample is spread evenly along the column all of the sample in the injector has been added to the column ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Derivatisation of a sample is carried out to increase the detector response increase volatility of the analytes reduce polarity of the analytes All of these increase the detector response increase volatility of the analytes reduce polarity of the analytes All of these ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Which of the following detectors give concentration-dependent signals? Infra-red detector Thermal conductivity All of these Electron-capture detector Infra-red detector Thermal conductivity All of these Electron-capture detector ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Resolution is proportional to the square root of the number of theoretical plates in a column square of the number of theoretical plates in a column number of theoretical plates in a column cube root of the number of theoretical plates in a column square root of the number of theoretical plates in a column square of the number of theoretical plates in a column number of theoretical plates in a column cube root of the number of theoretical plates in a column 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 The proportional difference in widths of two chromatographic peaks None of these The maximum number of different species which a column can separate simultaneously The relative separation achieved between two species The proportional difference in widths of two chromatographic peaks None of these ANSWER DOWNLOAD EXAMIANS APP