CHE-10 Spectroscopy Solved Assignment 2018

Description

CHE-10 English Medium Solved Assignment 2018
Program: Bachelor’s Degree Programme (B.Sc.)
(Valid from 1st January, 2018 to 31stDecember, 2018)

Course Name: Spectroscopy
Course Code: CHE-10
Assignment Code: CHE-10/TMA/2018

1. Discuss the vector nature of orbital angular momentum of an electron of the hydrogen atom.
2. Explain the origin of D-lines in the spectrum of sodium atom using suitable diagram.
3. What is the shape of BF3 molecule? Draw the symmetry elements present in it.
4. Illustrate the axis of improper rotation in ethane molecule.
5. Draw a diagram for the rotational levels of ¹²CO and ¹³CO and comment on the spacing between their spectral lines.
6. Derive the following expression:
   ν_osc1/2π√k/m
7. Discuss the origin of three bands in vibrational spectrum of HCl.
8. Explain the following:
   (a) Water molecule has three vibrational degrees of freedom whereas ammonia molecule has six vibrational degrees of freedom.
   (b) The carbonyl frequency in esters is higher than that in ketones.
9. Draw the vibrational modes of N₂O molecule. What is its point group and geometry?
10. Discuss the rotational Raman spectrum of CO₂ molecule with the help of the suitable diagram.
11. Derive the term symbol for the ground state of LiH.
12. How does solvent polarity affect π-π^x and n-π^x transitions? Explain.
13. Give reason for the following:
    (a) Mercury (II) iodide is brick red in colour.
    (b) The aqueous solution of NiSO₄ which is pale green turns deep blue on addition of ethylenediamine.
15. Draw and explain the NMR spectrum of CH₃CHO.
16. The hydrogen atoms attached to a double bond are deshielded while in case of alkynes the protons are shielded. Explain.
17. Draw and explain the important components of an ESR spectrometer.
18. Discuss the ESR spectrum of ethyl radical.
19. What is simple cleavage? Illustrate with the help of a suitable example.
20. Discuss the expected spectral data for C₆H₅CH₂OH.