ORIGIN OF SPECTRUM

Question 1

The analysis of electromagnetic radiation scattered, absorbed or emitted by the molecule is called __________
a) Kaleidoscopy
b) Astronomy
c) Spectroscopy
d) Anatomy

Answer 1

c) Spectroscopy

Question 2

The energy level with lower energy is called __________
a) Ground state energy level
b) Initial state energy level
c) Excited state energy level
d) All of the mentioned

Answer 2

a) Ground state energy level

Question 3

Absorption spectrum results when an electron in an atom undergoes a transition from __________
a) Higher energy level to a lower one
b) Lower energy level to a higher one
c) Intermediate levels
d) All of the mentioned

Answer 3

b) Lower energy level to a higher one

Question 4

The energy of a photon is given by __________
a) h/ν
b) ν/h
c) 1/hν
d) hν

Answer 4

d) hν

Question 5

Select the incorrect statement from the following option.
a) Emission spectrum results when an electron in an atom undergoes a transition from excited state to the ground state
b) In the emission spectrum, transition takes place with the emission of a photon of energy hν
c) In the emission spectrum, transition takes place with the absorption of a photon of energy hν
d) All of the mentioned

Answer 5

c) In the emission spectrum, transition takes place with the absorption of a photon of energy hν

Question 6

The spectra can be broadly classified into two categories. They are __________
a) Atomic and molecular spectra
b) Atomic and electronic spectra
c) Molecular and electronic spectra
d) None of the mentioned

Answer 6

a) Atomic and molecular spectra

Question 7

In atomic spectroscopy, only electronic transitions are involved.
a) True
b) False

Answer 7

a) True

Question 8

Select the correct statement from the following options.
a) Molecular spectra arises from the transition of an electron between the molecular energy levels
b) In molecular transitions, electronic, rotational and vibration transitions occurs
c) Molecular spectra is more complicated than atomic spectra
d) All of the mentioned

Answer 8

d) All of the mentioned

Question 8

The necessary condition for absorption spectrum is that __________
a) hν should be greater than the energy difference
b) hν should be smaller than the energy difference
c) hν should be equal to the energy difference
d) none of the mentioned

Answer 8

c) hν should be equal to the energy difference

Question 8

Spectroscopy deals with the transition that a molecule undergoes on the absorption of suitable radiations determined by quantum mechanical selection rules.
a) True
b) False

Answer 8

a) True