IR and Raman spectroscopy

In IR spectrophotometry, analyte concentration is quantified based on ........

• Wavenumber

• Frequency

• Absorbance

• Transmission

Concentration of methocarbamol in an injection solution is determined by IR spectrophotometry by measuring the absorbance of the solution at 1730 cm-1. What is this determination called?

• qualitative analysis

• multivariate analysis

• multivariate calibration

• univariate analysis

Monochromator is used in the following instrument, EXCEPT.....

• UV/vis spectrophotometer

• Raman spectrometer

• Fourier Transform IR Spectrophotometer

• Spectrofluorometer

For IR measurement, powdered samples can be prepared using the following methods, EXCEPT........

• Spread between salt plates

• Made into KBr pellet

• Dissolved in suitable solvent

• Dispersed in mineral oil

The following techniques allow for sample measurement without sample preparation, EXCEPT....

• Attenuated Total Reflectance IR

• Fourier Transform IR

• Diffuse Reflectance IR

• Near IR Spectroscopy

The basis of Raman spectroscopy is

• Light absorption

• Light scattering

• Molecular rotation

• Electronic transition

Elastic scattering is called ........

• Raman Scattering

• Stokes scattering

• Rayleigh scattering

• Anti-Stokes scattering

To remove Rayleigh scattering, a Raman instrument is typically equipped with.......

• Laser

• Michelson interferometer

• Notch filter

• Laser filter

A vibration is Raman-active if there is change in .............

• polarizability

• dipole moment

• electric field

• bond length

Asymmetric stretching vibration is .....

• IR active, Raman active

• IR inactive, Raman inactive

• IR active, Raman inactive

• IR inactive, Raman active