IGNOU MSCANCHEM MCH 2 SOLVED ASSIGNMENT

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MCH 2 2025 - English

Tutor Marked Assignment

MCH-002: Separation Methods

Course Code: MCH-002

Assignment Code: MCH-002/TMA/2025

Maximum Marks: 100

Note: Answer all the questions given below.

1. Briefly explain the separation methods based on surface activity.

2 Discuss various criteria used for the selection of separation methods.

3. Explain percentage extraction. Derive the expression for it.

4. Describe salient features of extractions using crown ethers.

5. With the help of suitable examples, describe the extraction of anionic metal complexes by high molecular weight amines.

6. Discuss the role of masking agents in solvent extraction.

7. Brief explain the concept of theoretical plates.

8. Draw van Deemter plot. What conclusions can be drawn on the basis of reducing zone broadening?

9. Enlist any five characteristics of ideal support material for liquid-liquid partition chromatography.

10. Discuss frontal analysis development technique for liquid column chromatography.

11. List any ten differences between paper chromatography and thin layer chromatography.

12. Which different factors make the results of TLC difficult to reproduce?

13. Briefly explain various interaction forces which can aid in GC separation.

14. List the requirements of a liquid phase used in gas chromatography.

15. Compare the important aspects of GC and HPLC.

16. Discuss different types of capacities of an ion exchanger.

17. Explain the unique features of size exclusion chromatography.

18. What are ion selective electrodes? Explain their use and applications.

19. Discuss important aspects of Knudsen flow.

20. Discuss the reagents and instruments used for electrophoresis.

 

MCH 002 (January 2026) - ENGLISH

TUTOR MARKED ASSIGNMENT SEPARATION METHODS

Course Code: MCH-002

Assignment Code: MCH-002/TMA/2026

Maximum Marks: 100

Note: Answer all the questions given below.

1. How can electromigration be used as a property for separation? Give various techniques based on it.

2. Discuss the important features of extraction by compound formation using carboxylic and sulphonic acids.

3. List the essential characteristics of diluents.

4. How does pH affect the extraction? Illustrate giving suitable examples.

5. Briefly explain stripping in the context of metal ion separations.

6. Briefly discuss the basis of classification of various chromatographic techniques.

7. Describe the important parameters of stationary phases used in liquid-solid chromatography.

8. Discuss the applications of paper chromatography.

9. What are different factors which make Ry values in TLC difficult to reproduce?

10. Discuss the conclusions of the rate theory of van Deemter which can be used to improve column efficiency.

11. List the characteristics of solid stationary support used in gas chromatography.

12. List the general criteria for the selection of a mobile phase in HPLC.

13. Give the requirements of a detector used in HPLC.

14. Briefly explain various types of cation exchangers used in ion exchange chromatography.

15. What is meant by the capacity of an ion exchanger? Explain various types of capacities.

16. Briefly discuss important properties of gels used in chromatography.

17. Describe the preparative applications of size exclusion chromatography.

18. Discuss the principle and use of electrodialysis.

19. What is an ion selective membrane electrode? Give the basic principle of its function.

20. Give a brief account of SDS-PAGE gel electrophroresis.

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