1) In Raman Spectroscopy, energy of change comes from
(a)Electron (b) photon☑️
(c) ion (d) molecule
2) Frequency of Photons shifts electrons from one state to another in
(a)Raman Spectroscopy ☑️
(b) Spectroscopy
(c) Crystalization
(d) Vaporization
3) Beer Lambert’s law gives the relation between which of the following?
(a) Reflected radiation and concentration
(b) scattered radiation and concentration
(c) Energy absorption and reflected radiation☑️
(d) Energy absorption and concentration
4) Beer’s law states that the intensity of light decreases with respect to
(a) Concentration ☑️
(b) composition
(c) distance
(d) volume
5) The elastic scattering of photons is called as
(a) Atmospheric scattering
(b) Rayleigh scattering☑️
(c) Conserved scattering
(d) Raman scattering
6) The inelastically scattered photons are called as
(a) Raman scattering ☑️
(b) Rayleigh scattering
(c) Atmospheric scattering
(d) Conserved scattering
7) Which of the following is the principal of atomicabsorption spectroscopy
(a) Radiation is absorbed by non excited atoms in vapour state and are Excited to higher state ☑️
(b) Medium absorbs radiation and transmitted radiation is measured
(c) Colour is measured
(d) Colour is simply observed
8) Which of the following can not be conserved during Raman scattering?
(a) Total energy
(b) momentum
(c) kinetic energy ☑️
(d) electronic energy
9) How many degrees of freedom does a chemical compound of N atoms have?
(a) 2N (b) 2N+1 (c) 3N☑️ (d) 3N+1
10) In Raman spectroscopy, the radiation lies in the
(a) Microwave region
(b) visible region ☑️
(c) UV region
(d) X ray region
11) The Raman shift generally lies between
(a) 100-1000 cm-1
(b) 100-2000 cm-1
(c) 100-3000 cm-1
(d) 100-4000 cm-1☑️
12) The most commonly used laser for Raman spectroscopy is
(a) He-Hg
(b) Ruby laser
(c) He-Ne laser☑️
(d) semiconductor laser
13) Which of the following lines are intense?
(a) Strokes lines
(b) Rayleigh scattered lines ☑️
(c) anti strokes lines
(d) All have same intensity
14) The absorbed wavelengths in atomic absorption spectrum appear as
(a) Dark background
(b) dark lines☑️
(c) light background
(d) light lines
15) The wave numbers decrease from
(a) Lyman to pfund series ☑️
(b) pfund to Lyman series
(c) balmer to bracket series
(d) none of above
16) In the atomic absorption spectroscopy which the following is the generally used radiation source?
(a) tungsten lamp
(b) xenon mercury lamp
(c) hydrogen discharge lamp ☑️
(d) Hollow cathode lamp
17) During the motion,if the centre of gravity of molecule changes,the molecule possess
(a) electronic energy
(b) rotational energy
(c) translation energy☑️
(d) vibrational energy
18) paschen series series lie in
(a) UV region
(b) visible region
(c) infrared region ☑️
(d)alpha region
19) the spectrum of hydrogen can be obtained in
(A)test tube (b) discharge tube ☑️
(c)glass (d) space
20) in the spectrum of sodium the number of lines obtained are
(a) two ☑️
(b)three
(c) four
(d) five
Post a Comment