Chromatography – Section 1

1. Thin layer chromatography is

A. partition chromatography
B. electrical mobility of ionic species
C. adsorption chromatography
D. none of the above

Correct Answer: C. adsorption chromatography

2. In gas chromatography, the basis for separation of the components of the volatile material is the difference in

A. partition coefficients
B. conductivity
C. molecular weight
D. molarity

Correct Answer: A. partition coefficients

3. In reverse phase chromatography, the stationary phase is made

A. non-polar
B. polar
C. either non-polar or polar
D. none of these

Correct Answer: A. non-polar

4. Ion exchange chromatography is based on the

A. electrostatic attraction
B. electrical mobility of ionic species
C. adsorption chromatography
D. partition chromatography

Correct Answer: A. electrostatic attraction

5. The general expression for the appearance of a solute in an effluent is (where V is the elution volume of a substance , V0 void volume, kD distribution constant and Vi internal water volume)

A. V = V0+ kDVi 
B. V = V0/Vi
C. V = V0– kDVi
D. V/V0= kDVi

Correct Answer: A. V = V0+ kDVi 

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