Gas Chromatography In column switching chromatography any of the above one column is removed and replaced by another the flow to the column is switched on and off repeatedly compounds trapped on one column are eluted to another column any of the above one column is removed and replaced by another the flow to the column is switched on and off repeatedly compounds trapped on one column are eluted to another column ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Theoretical plates are used to determine the thickness of the stationary phase measure the distribution of the analyte between mobile and stationary phases None of these estimate the efficiency of a column determine the thickness of the stationary phase measure the distribution of the analyte between mobile and stationary phases None of these estimate the efficiency of a column ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography The GC trace obtained after an experiment is called a chromatogram chromatophore chromatograph graph chromatogram chromatophore chromatograph graph ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Which of the following are not used as stationary phases in a GC column? Silica None are used as stationary phases Cyclodextrins Polysiloxanes Silica None are used as stationary phases Cyclodextrins Polysiloxanes ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What is the typical internal diameter of fused silica capillary columns? 1.0-2.0 mm 0.2-0.3 mm 0.5-1.0 mm 0.3-0.5mm 1.0-2.0 mm 0.2-0.3 mm 0.5-1.0 mm 0.3-0.5mm ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What does the retention factor, k', describe? 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 All of these ANSWER DOWNLOAD EXAMIANS APP
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