Molecular Physics-Elementary Theory of Rotational, Vibrational and Electronic Spectra of Diatomic Molecules [IAS (Admin.) Mains Physics]: Questions 1 - 6 of 20
Choose Programs:
📹 Video Course 2024 (300 Lectures [199 hrs : 9 mins]): Offline Support
Rs. 1230.00 -OR-
1 Month Validity (Multiple Devices)
Preview All LecturesDetails
🎓 Study Material (549 Notes): 2024-2025 Syllabus
Rs. 600.00 -OR-
3 Year Validity (Multiple Devices)
Topic-wise Notes & SampleDetails
🎯 544 Questions (& PYQs) with Full Explanations (2024-2025 Exam)
Rs. 1000.00 -OR-
3 Year Validity (Multiple Devices)
CoverageDetailsSample Explanation
Help me Choose & Register (Watch Video) Already Subscribed?
Question 1
Appeared in Year: 2011 (IFS)
Describe in Detail Subjective▾
Give the elementary theory of NMR. Explain the two different relaxation processes. (Paper – II)
EditExplanation
- In Nuclear Magnetic Resonance (NMR) , the frequency of processing nucleus is equal to the frequency of rotating magnetic field. Here it is important to notice that in NMR we are not performing experiments on the electron, it all about the nuclei of the nucleus.
- The principle of NMR is dependent on the spins of atomic nuclei. Consider, the subatomic …
… (891 more words, 22 figures) …
Question 2
Appeared in Year: 2010
Write in Short Short Answer▾
In CO molecule line occurs at a frequency Calculate the moment of inertia of CO molecule. (Marks: 10)
EditQuestion 3
Appeared in Year: 2015
Write in Short Short Answer▾
The observed vibrational frequency of molecule is . What is the effective force constant of the molecule? (10 Marks)
EditQuestion 4
Appeared in Year: 2010
Describe in Detail Subjective▾
Is it possible to obtain pure rotational spectra of and molecules?
EditExplanation
- Molecules that have permanent electric dipole moments can absorb or emit electromagnetic radiation in for infra-red or microwave transition. It means that homonnuclear diatomic molecules such as symmetric linear molecules such as
… (27 more equations) …
Question 5
Appeared in Year: 2010
Describe in Detail Subjective▾
Discuss occurrence of rotational energy levels of a diatomic molecule and show that the pure rotation spectrum of such a molecule consists of a series of equally spaced lines separated by a constant wave number difference . write down the selection rules.
EditExplanation
- As we know, all (heteronuclear) diatomic molecules with “unlike” atoms, for which the Centers of positive and negative charges do not coincide, have a permanent dipole moment. During the rotation of the molecule, the component of the dipole moment in a fixed direction changes periodically with the frequency of rotation,
… (2502 more equations, 81 figures) …
Question 6
Appeared in Year: 2003
Describe in Detail Subjective▾
The rotational spectrum of consists of equidistant lines with a separation of . Calculate the (a) M. I and (B) band length of molecule.
EditExplanation
The separation is given by (gives)
The rotational constant is given b…
… (187 more equations) …