Gas Chromatography Helium is generally preferred as carrier gas over nitrogen and hydrogen because all of above it doubles up as a party gas for balloons and funny voices it has a lower viscosity it is inert all of above it doubles up as a party gas for balloons and funny voices it has a lower viscosity it is inert ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Derivatisation of a sample is carried out to reduce polarity of the analytes increase the detector response increase volatility of the analytes All of these reduce polarity of the analytes increase the detector response increase volatility of the analytes All of these ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Resolution is proportional to the number of theoretical plates in a column cube root of the number of theoretical plates in a column square of the number of theoretical plates in a column square root 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 of the number of theoretical plates in a column square root of the number of theoretical plates in a column ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography A retention gap is placed between the injector and the front of the column to prevent backflush of the injected solution retain contaminants and prevent them from reaching the column All of these retain the sample and release it gradually to the column prevent backflush of the injected solution retain contaminants and prevent them from reaching the column All of these retain the sample and release it gradually to the column ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What does the retention factor, k', describe? All of these The velocity of the mobile phase The distribution of an analyte between the stationary and the mobile phase The migration rate of an analyte through a column All of these The velocity of the mobile phase The distribution of an analyte between the stationary and the mobile phase The migration rate of an analyte through a column ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Which of the following detectors give concentration-dependent signals? Thermal conductivity All of these Electron-capture detector Infra-red detector Thermal conductivity All of these Electron-capture detector Infra-red detector ANSWER DOWNLOAD EXAMIANS APP
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