Q. For a molecule to absorb IR, why must the molecule's vibrations cause fluctuations in the dipole moment of the molecule?

View solution

Q. Internal conversion is where

View solution

Q. Why phosphorescence measurements are usually made at a low temperature?

View solution

Q. Fluorescence occurs when

View solution

Q. Thin layer chromatography is

View solution

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

View solution

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

View solution

Q. Ion exchange chromatography is based on the

View solution

Q. 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)

View solution

Q. A combination of paper chromatography and electrophoresis involves

View solution

Q. HPLC stands for

View solution

Q. The eluent strength is a measure of

View solution

Q. HPLC methods include

View solution

Q. Column efficiency is measured in terms of number of plates which is

View solution

Q. For a typical adsorbent such as silica gel, the most popular pore diameters are

View solution

Q. An isocratic elution in HPLC is one in which the composition of the solvent

View solution

Q. In reversed phase HPLC, there is a

View solution

Q. Which of the following statements is true for a refractive index detector in HPLC?

View solution

Q. A gradient elution in HPLC is one in which the composition of the solvent

View solution

Q. An eluotropic series

View solution