U2U1/7N15 Reg. No

St. Joseph’s College of Arts & Science (Autonomous) St. Joseph’s College Road, Cuddalore – 607001 ACH202 – INDUSTRIAL CHEMISTRY

Time : 3 hrs

Max Marks :75 SECTION – A (20X1=20) Answer ALL Questions

I. Choose the correct answer 1. The most Common method of purifying liquids. a) Distillation b) Crystallisation c) Sublimation d) Fractimal crystallization 2. Volatility of a liquid is __________ to boiling point of liquid. a) Equal b) Proportional c) Inversely proportional d) Not related 3. The most useful application in separation of structurally similar compounds. a) HPLC b) Ion-exchange c) Column adsorption chromatography d) TLC 4. The mobile phase is a liquid or a gas which is forced through the fixed phase by pressure in ______ a) Ion-exchange chromatography b) TLC c) HPLC d) Column chromatography 5. Chemicals which are used to control rats in Agricultural lands are called ___________ a) Pesticide b) Herbicide c) Rodenticide d) Fungicide 6. __________ is an example for bio polymer. a) PVC b) Silk c) Benzene

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d) Hemoglobin

U2U1/7N15 7. Chemical compounds which are used for diagnosis, treatment and curing a disease in human or animal is called. a) Drug b) Medicine c) Polymer d) Formula 8. The movement of the atoms with respect to a particular atom in a molecule is in the same direction. a) Rocking b) Wagging c) Symmetric stretching d) None of the above 9. Eriochrome - Black-T is a/an _________ a) Indicator b) Ligand

c) Acid

d) Base

10. The process of removing Common salt from the water a) Reverse Osmosis b) Desalination c) Ion-exchange d) All the above II. Fill up the blanks 11. _________ method used to separate liquids which are miscible with one another. 12. ___________ is an example for Pheromones. 13. In polarography, the working electrode is a ________ 14. Beer’s Lambert’s law is used in the analysis of __________ 15. Water, which produces lather readily with soap solution is _______ III. Match the following: 16. Steam distillation

- LIGANDS

17. Ammonium sulphate

- Electronic transitions

18. Polarography

- Fertilizer

19. CO compounds

- Volatile organic compounds

20. EDTA

- Instrumental techniques

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U2U1/7N15 SECTION – B (10X2=20) Answer any TEN Questions 21. What are the uses of sublimation? 22. Clearly differentiate distillation and fractional distillation. 23. What are the stationary and mobile phases used in TLC? 24. Write the names of two different resins used in Ion-exchange chromatography. 25. Define Disease. 26. What is degree of polymerization? 27. Draw the schematic diagram of single beam spectrophotometer. 28. Listout the types of vibrations in vibrational spectroscopy. 29. What is meant by permanent hardness? 30. State the absorption laws. 31. Write a short note on demineralization. 32. Write a note on additive. SECTION –C (5X7=35) Answer any FIVE Questions 33. a) Explain the principles and uses of steam distillation. b) Write a brief note on crystallization.

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U2U1/7N15 34. a) Describe the technique of column chromatography with a block diagram. (4) b) What are the factors which decide the magnitude of Rf Value? (3) 35. a) Give the synthesis of DDT. b) What are the uses of parathion.

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36. a) Write a note on dendrimers. b) Explain Number average molecular weight.

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37. a) What happens when EDTA is added to hard water? b) How is water demineralised in an ion-exchanger?

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38. a) Give the type of fertilizers. b) What are the essential requirements of a fertilizer.

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39. a) Define desalination. b) Explain water softening using zeolite process.

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