Syllabus: Characterization of electromagnetic radiations, Regions of the spectrum,Interaction of radiations with matter - absorption, emission, transmission, reflection, dispersion, polarization and representation of spectra, basic elements of practical spectroscopy, resolving power, signal to noise ratio.Uncertainty relation and natural line width, natural line broadening, intensity of spectral lines, energy levels, selection rules, components of spectrometer and their functions.
Multiple Choice Questions
1. Which of the following molecule shows rotational spectra
a) HCl
b) BF3
c) CO2
d) CCl4
2.
Which of the following molecule
shows vibrational spectra
a) Cl2
b) H2
c) O2
d) C6H6
3.
Radiation source for UV radiation
is
a) Tungsten lamp
b) Sodium lamp
c) Hydrogen lamp
d) Nearnst glower
4.
Radiation source for visible
radiation is
a) Tungsten lamp
b) Nearnst glower
c) Hydrogen lamp
d) None of these
5.
Sample holder for IR spectroscopy
made up of
a) NaCl
b) PMMA
c) Glass
d) Quartz
6.
Which of the following used as
wavelength selector in spectroscopy
a) Prism
b) Diffraction grating
c) Both a and b
d) None of these
7.
What will reduce the width of
spectral line
a) By decrease in temperature of sample
b) By increase in temperature of sample
c) By replacing the source of instrument
d) None of these
8.
Which of the following factor
contribute on line width
a) Doppler Broadening
b) Collision Broadening
c) Static interactions
d) All of these
9.
Photon detector used in Infra red
region
a) Thermocouple
b) Photographic plate
c) Photomultiplier tube
d) Human eye
10.
Electromagnetic radiation is
characterized by
a) Amplitude
b) Periodicity
c) Wavelength and wave number
d) All of these
11.
The Phenomenon related to frequency
and intensity of radiation include
a) Absorption
b) Raman and Rayleigh scattering
c) Phosphorescence and fluorescence
d) All of these
12.
NMR observed in the region
a) UV
b) Radiofrequency
c) Microwave
d) X-ray
13.
The rotational spectra involve
a) a very high energy changes
b) small energy changes
c) no energy change
d) none of these
14.
A molecule can be excited to only the next
higher rotational level by
a) absorption of energy
b) release of energy
c) the electric current
d) applying magnetic field
15.
The electronic spectra consists of
a) a large number of absorption bands
b) a large number of closely packed lines
c) a large number of peaks
d) none of these
16.
The electronic spectra lies within
a) infrared region
b) visible or ultraviolet regions
c) radio wave region
d) micro waves region
17.
The wave numbers are expressed in
a) sec–1
b) cm sec–1
c) cm–1
d) cm2 sec–1
18.
The electromagnetic radiations of
higher wavelengths has _______ energy.
a) higher
b) Lower
c) intermediate
d) Zero
19.
Which of the following is not true about
electromagnetic radiation?
a) frequency is directly proportional to wavelength
b) frequency is directly proportional to wavenumber
c) energy is inversely proportional to wavelength
d) energy is inversely proportional to wavenumber
20.
What type of radiation is used in
nuclear magnetic resonance (NMR) spectroscopy?
a) ultraviolet light
b) Microwaves
c) radio waves
d) infrared radiation
1. Which of the following molecule shows rotational spectra
a) HCl
b) BF3
c) CO2
d) CCl4
a) Cl2
b) H2
c) O2
d) C6H6
a) Tungsten lamp
b) Sodium lamp
c) Hydrogen lamp
d) Nearnst glower
a) Tungsten lamp
b) Nearnst glower
c) Hydrogen lamp
d) None of these
a) NaCl
b) PMMA
c) Glass
d) Quartz
a) Prism
b) Diffraction grating
c) Both a and b
d) None of these
a) By decrease in temperature of sample
b) By increase in temperature of sample
c) By replacing the source of instrument
d) None of these
a) Doppler Broadening
b) Collision Broadening
c) Static interactions
d) All of these
a) Thermocouple
b) Photographic plate
c) Photomultiplier tube
d) Human eye
a) Amplitude
b) Periodicity
c) Wavelength and wave number
d) All of these
a) Absorption
b) Raman and Rayleigh scattering
c) Phosphorescence and fluorescence
d) All of these
a) UV
b) Radiofrequency
c) Microwave
d) X-ray
a) a very high energy changes
b) small energy changes
c) no energy change
d) none of these
a) absorption of energy
b) release of energy
c) the electric current
d) applying magnetic field
a) a large number of absorption bands
b) a large number of closely packed lines
c) a large number of peaks
d) none of these
a) infrared region
b) visible or ultraviolet regions
c) radio wave region
d) micro waves region
a) sec–1
b) cm sec–1
c) cm–1
d) cm2 sec–1
a) higher
b) Lower
c) intermediate
d) Zero
a) frequency is directly proportional to wavelength
b) frequency is directly proportional to wavenumber
c) energy is inversely proportional to wavelength
d) energy is inversely proportional to wavenumber
a) ultraviolet light
b) Microwaves
c) radio waves
d) infrared radiation
