Download PTU M-Sc -Chemistry 3rd Semester May 2019 72620 SPECTROSCOPY II Question Paper

Roll No.

Total No. of Questions : 09

Total No. of Pages : 02

--- Content provided by‍ FirstRanker.com ---

(Sem.-3)

SPECTROSCOPY – II

M.Sc.(Chemistry) (2015 to 2017)

Subject Code : MSCH-302

M.Code: 72620

--- Content provided by⁠ FirstRanker.com ---

Time: 3 Hrs.

Max. Marks : 100

INSTRUCTIONS TO CANDIDATES :

1. First question is compulsory. Attempt one question from each unit and five questions in total.

Q1 Answer briefly : (2×10=20)

--- Content provided by FirstRanker.com ---

1. What is soft ionization?
2. What is MacLafferty rearrangement?
3. What is quadrupole effect?
4. What are metastable ions?
5. Name spin-spin splitting rules.

--- Content provided by‍ FirstRanker.com ---

6. What is shielding effect?
7. How many peaks in ¹H NMR will be observed for 4-methyltoluene?
8. How many peaks in ¹³C NMR will be observed for ethanol?
9. How will you differentiate between o-phenylenediamine & p-phenylenediamine?
10. What are chemical shift reagents?

--- Content provided by⁠ FirstRanker.com ---

UNIT-I

Q2. a. Write a note on chiral resolving agents with suitable examples. (6)

b. What is NOE effect? (6)

c. Write a note on: DEPT, HETCOR & magnetic resonance imaging. (8)

Q3. a. Write a detailed account on first order and second order spectra. (10)

--- Content provided by‌ FirstRanker.com ---

b. Describe the effect of solvent on chemical shift. (5)

c. Write a note on 2D NMR spectroscopy. (5)

UNIT-II

Q4. Write a detailed account on NQR spectroscopy with applications. (20)

Q5. Write a detailed account on EPR spectroscopy with applications. (20)

--- Content provided by‍ FirstRanker.com ---

UNIT-III

Q6. Describe various applications of Mossbauer spectroscopy. (20)

Q7. a. Describe Mossbauer spectrum and its parameters in detail. (10)

b. Describe the scheme of Mossbauer experiment with the help of block diagram. (10)

UNIT-IV

--- Content provided by‌ FirstRanker.com ---

Q8. a. Describe various ionization methods used in mass spectrometry. (10)

b. What is nitrogen rule? Describe its importance with suitable examples. (10)

Q9. a. Describe fragmentation patterns of alkyl and aryl halides with suitable examples. (6)

b. Describe the importance of relative abundance in mass spectrometry. (8)

c. Write a note on molecular weight and molecular formula determination by mass spectrometry. (6)

--- Content provided by​ FirstRanker.com ---

NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any page of Answer Sheet will lead to UMC against the Student.

You can download this paper and other previous year papers from FirstRanker.com