Atomic and Molecular Physics [GATE (Graduate Aptitude Test in Engineering) Physics (PE)]: Questions 35 - 39 of 109

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Question 35

Appeared in Year: 2011

Question MCQ▾

The far infrared rotational absorption spectrum of a diatomic molecule shows equidistance lines with spacing . The position of the first Stokes line in the rotational Raman spectrum of this molecule is –

Choices

Choice (4)Response

a.

b.

c.

d.

Edit

Question 36

Appeared in Year: 2010

Question MCQ▾

Two states of an atom have definite parities. An electric dipole transition between these states is

Choices

Choice (4)Response

a.

Allowed if both the states have even parity

b.

Allowed if both the states have odd parity

c.

Not allowed unless a static electric field is applied

d.

Allowed if the two states have opposite parities

Edit

Question 37

Appeared in Year: 2010

Question MCQ▾

To detect trace amount of a gaseous species in a mixture of gases, the preferred probing tools is –

Choices

Choice (4)Response

a.

ESR spectroscopy

b.

Laser spectroscopy

c.

NMR spectroscopy

d.

Ionization spectroscopy with – rays

Edit

Question 38

Appeared in Year: 2010

Question MCQ▾

The first three energy levels of are shown below

The expected spin – parity and energy of the next level are given by –

Choices

Choice (4)Response

a.

b.

c.

d.

Edit

Question 39

Appeared in Year: 2010

Question Match List-Ⅰ List-Ⅱ▾

Match the typical spectra of stable molecules with the corresponding wave number range –

List-Ⅰ (Group I)List-Ⅱ (Group II)
(A)

Electronic spectra

(i)

and above

(B)

Molecular spectra

(ii)

(C)

Rotational spectra

(iii)

Choices

Choice (4)Response
  • (A)
  • (B)
  • (C)

a.

  • (ii)
  • (iii)
  • (i)

b.

  • (ii)
  • (i)
  • (iii)

c.

  • (i)
  • (iii)
  • (ii)

d.

All of the above

Edit