Gas Chromatography Sample retention in the column is measured by retention factor retention index all of these retention time retention factor retention index all of these retention time 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 Cyclodextrins Polysiloxanes Silica None are used as stationary phases Cyclodextrins Polysiloxanes Silica 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 What useful information can be found from a Van Deemter plot? Optimum mobile phase flow rate Optimum column temperature The selectivity factor Optimum column length Optimum mobile phase flow rate Optimum column temperature The selectivity factor Optimum column length ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Sample injection is considered successful if 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 the sample is homogenously spread along the column ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Resolution is proportional to the 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 square root of the number of theoretical plates in a column ANSWER DOWNLOAD EXAMIANS APP
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