Q.Which of the following cannot be used as carrier gas in gas chromatography
A. Hydrogen
B. Nitrogen
C. Helium
D. Oxygen
Ans. Oxygen
Q.Gel chromatography method separates different substances depending on their
A. Molecular size
B. Molecular weight
C. Density
D. Viscosity
Ans. Molecular size
Q.To explain the column efficiency, two theories i.e., plate and rate theory has been proposed.
They are related to
A. HPLC
B. Gel chromatography
C. Gas liquid chromatography
D. Paper chromatography
Ans. Gas liquid chromatography
Q.Porphyrins can be separated using which stationary phase
A. Magnesium carbonate
B. Alumina
C. Aluminium silicate
D. Silica gel
Ans. Magnesium carbonate
Q.The composition of sephadex used as stationary phase in gel chromatography is
A. Starch
B. Polyacrylamide
C. Cross linked dextran
D. Polyvinyl acetate
Ans=Cross linked dextran
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