Name: Separation and Spectroscopic Methods
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IGNOU MPC-51 (July 2025 – June 2026) Assignment Questions

1.(a) Briefly discuss the extraction of metal ions using crown ethers.
(b)Giving suitable examples, discuss the role of masking agents in extractions.

2.(a)What are the characteristics of stationary phases used in liquid-solid chromatography? Discuss various types of adsorbents used.
(b)Give any five comparisons between PC and TLC.

3.(a) Give a brief account Give a brief account of various injection systems used in gas chromatography.
(b)Draw a schematic diagram of an HPLC instrument and also list the components.

4.(a)Discuss the use of hydrous oxides of polyvalent metals as synthetic ion exchangers giving suitable examples.
(b)Describe the unique features of size exclusion chromatography.

5.(a)Discuss the applications of membrane separations in

(i) water treatment
(ii) production of table salt

(b)Give important aspects of capillary electrochromatography.

6.(a)Explain the nature of absorption spectra for the transition and inner transition elements by UV-Vis spectroscopy. Also specify the reasons of difference between the two.
(b)What are the advantages of UV-Vis spectrometry for quantitative determinations? Write the steps involved in the quantitative determinations using this technique.

7.(a)How does FTIR differ from traditional dispersive IR spectrometry? Write any four advantages of the FTIR spectrometry.
(b)What are the two aspects in which fluorimetry differs from phosphorimetry? Describe the aspects.

8.(a)List the characteristics of atomisation-excitation source in atomic emission spectrometry. Name the three types of plasma sources.
(b)Describe the principle of FT-NMR spectroscopy. Explain how is this spectroscopy advantageous over the CW-NMR spectroscopy.

9.(a)What is DEPT in 13C NMR spectroscopy? Describe the features of its various types.
(b) List the limitations of 1D NMR spectroscopy. How does 2D NMR help in fulfilling the limitations?

10.(a) What are the two types of ion sources used in mass spectrometry? Explain these sources.
(b) Compare GC-MS and LC-MS and LC-MS with reference to the sample types and the solvents used.

MCH-22 Assignments Details

University	:	IGNOU (Indira Gandhi National Open University)
Title	:	Separation and Spectroscopic Methods
Language(s)	:	English
Code	:	MCH-22
Degree	:	MSCCHEM
Subject	:	Chemistry
Course	:	Core Courses (CC)
Author	:	Gullybaba.com Panel
Publisher	:	Gullybaba Publishing House Pvt. Ltd.

IGNOU MCH-22 (Jul 25 - Jun 26) - Solved Assignment

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