Chromatography

Q1: Thin layer chromatography is

A partition chromatography

B electrical mobility of ionic species

C adsorption chromatography

D none of the above

ANS:C - adsorption chromatography

No answer description is available.

Q2: A combination of paper chromatography and electrophoresis involves

A partition chromatography

B electrical mobility of the ionic species

C both (a) and (b)

D none of these

ANS:C - both (a) and (b)

No answer description is available.

Q3: 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

ANS:A - partition coefficients

No answer description is available.

Q4: Ion exchange chromatography is based on the

A electrostatic attraction

B electrical mobility of ionic species

C adsorption chromatography

D partition chromatography

ANS:A - electrostatic attraction

No answer description is available.

Q5: In reverse phase chromatography, the stationary phase is made

A non-polar

B polar

C either non-polar or polar

D none of these

ANS:A - non-polar

In Reverse-phase, chromatography stationary phase is more polar than the mobile phase. Hence the stationary phase is made polar.

Q6: 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

ANS:A - V = V0 + kDVi

No answer description is available.



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