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1 VALLIAMMAI ENGINEERING COLLEGE DEPARTMENT OF CHEMISTRY CY6151- ENGINEERING CHEMISTRY-1 UNIT-1 POLYMER CHEMISTRY PART-A (2 MARKS) 1.What is menat by Polymerization? 2.Define degree of Polymerization? 3.Differentiate homochain and hetero chain polymers? Give examples. 4.Explain functionality with a suitable example. 5.What is meant by tacticity? 6.What are syndiotactic polymers? 7.How co polimerisation is carried out? Give an example. 8.Definie glass transition temperature. 9.How solution polymerization is carried out? 10.Distinguish between addition and condensation polymerization. 11.Define Polydispersity index. 12.Mention the various techniques of polymerization. 13.Explain Condensation polymerization with an example. 14.What are the advantages and disadvantages of Plastics? 15.What are thermo and thermosetting plastics? Give examples. 16.What do you understand by disproportion of polymer chains? 17.What is AIBN? Mention its role in polymerization reaction? 18.State the classification of Polymers. 19.What are epoxy resins? State its preparation. 20.How is Nylon 6,6 prepared? State its properties and uses. Prepared by: Ms. K. Anandhi & Ms. M. Meera Page 1
2 PART-B(16 MARKS) 1.i)Differentiate thermoplastics and thermosetting plastics. ii)explain the mechanism of free radical polymerization of polyvinyl chloride. 2.i)Explain the mechanism of cationic polymerization. ii)explain how molecular weight of a polymer is calculated by number average method. 3.i)Explain the mechanism of anionic polymerization. ii)explain how molecular weight of the polymer is calculated by weight average method. 4.i)Give detailed account on techniques of polymerization. ii)explain various functionality of a polymer with example and state its significance. 5.i)What are stereospecific polymers? Explain its various types. ii)how are Polymers classified? Explain. 6.Explain the following properties of polymers. i)glass transition temperature, ii)tacticity, iii)pdi 7.Write the preparation properties and uses of i)nylon-6.6,ii)epoxy resin 8.i)What are Plastics? Explain its advantages and disadvantages. ii)explain the bulk polymerization technique and mention the polymers that can be prepared by this technique. 9.i)Explain the mechanism of condensation polymerization in detail. ii)explain the nomenclature of polymers. 10.i)Describe the Emulsion polymerization technique. Give two examples. ii)describe the Suspension Polymerization technique. Give two examples. Prepared by: Ms. K. Anandhi & Ms. M. Meera Page 2
3 VALLIAMMAI ENGINEERING COLLEGE DEPARTMENT OF CHEMISTRY CY6151- ENGINEERING CHEMISTRY-1 UNIT 2 CHEMICAL THERMODYNAMICS PART A (2 MARKS) 1. Distinguish open, closed and isolated system. 2. Compare adiabatic process and isothermal process. 3. Explain thermodynamically reversible process. 4. What are the limitations of 1 st law of thermodynamics?(or) What is the need for 2 nd law of thermodynamics? 5. State any two statements of 2 nd law of thermodynamics. 6. Explain 2 nd law of thermodynamics in terms of entropy. 7. Calculate the S for fusion of ice. Given that T = 0ºC, H f =80Cal/g. 8. What is a spontaneous process? What are its criteria? 9. What is work function? Give its significance. 10. Explain Gibb s free energy with example. 11. State and explain the significance of Gibb s Helmholtz equation. 12. For a process having S = +ve, What is the condition for spontaneity at all temperature. 13. Write a VantHoff s isotherm equation for the following process n 1 A + n 2 b n 3 C + n 4 D 14. From Vanthoff isochore explain Lechatlier s principle. 15. Bring out the deduction of 16. Calculate for a system with P 1 = 1 atm, P 2 = 10 atm, T 1 = 273k, T 2 = 373 k. 17. What is the S for a isochoric process for one mole of a gas with C v = 1.7 cal/g with initial temperature 273 k to final temperature 373 k. 18. In what way G o is useful in calculating equilibrium constant. 19. How is G o is useful in electrochemistry calculations. 20. Distinguish intensive and extensive property with example. Prepared by: r.. e ara ephen & Ms.. Ka a shi Page 1
4 PART B (16 Marks) 1. i)on the basis of thermodynamics derive the relation ii) Discuss the various conditions for spontaneity and equilibrium state of a system. 2. i)derive the Clausius inequality. ii) Derive that S > 0 for an irreversible process. 3. i) Discuss the various statements for second law of thermodynamics with the mathematical expression for it and the significance of entropy. ii) Derive the entropy change for an isothermal reversible expansion of an ideal gas 4. i) Derive Gibb s Helmholtz equation. Mention its applications ii) For the reaction, H 2 + ½ O 2 H 2 O, H =-68.32, S = Calculate the value of free energy change at 25ºC. 5. i) Derive Clausius Clayperon equation. Mention its significance. ii) Calculate the change in Gibb s free energy for a process at 100ºC, H = 120 K Cal, S = 1.2 K. Comment on the feasibility. 6. i) Derive Vant Hoff s isotherm ii) Calculate the entropy change in the evaporation of one mole of water at 100ºC. Latent heat of vapourisation at 100ºC is 540 Cal/g 7. i) Derive an expression for the variation of equilibrium constant of a reaction with temperature. ii) k p for N 2 + 3H 2 - NH 3 is 1.64 x 10-4 atm and 0.144x10-4 atm at 400 o c and 500 o c respectively. Calculate the heat of the reaction. Given R = Cal/mole 8. i) Derive the following relation ii) Distinguish between (a)thermodynamically reversible and irreversible process (b) Isothermal and adiabatic process 9. i) What is a system? Discuss the various types of system. ii) The equilibrium constant for the reaction N H 2 2NH 3 at 400 C is X 10-4 and at 500 C is 1.44 X 10-4 atm. Calculate the heat of formation of 1 mole of ammonia from its elements within given range of temperature. 10. i) Describe a) Extensive property b) Intensive property iii)macroscopic properties. ii) Calculate the G when one mole of the ideal gas expands reversibly isothermally at 37ºC from an initial volume of 55dm 3 to 1000 dm 3. Prepared by: r.. e ara ephen & Ms.. Ka a shi Page 2
5 VALLIAMMAI ENGINEERING COLLEGE DEPARTMENT OF CHEMISTRY CY6151- ENGINEERING CHEMISTRY-1 UNIT-3 PHOTOCHEMISTRY AND SPECTROSCOPY PART-A (2 MARKS) 1. What is photochemistry? 2. What are dark reactions? 3. What are the differences between photochemical and thermal reactions? 4. Write the statement of Grotthus-Draper Law. 5. State Stark-Einstein law of photochemical equivalence. 6. State Lambertz law. 7. Define Beer-Lambertz law. 8. Define Quantum Yield. 9. Define Photosensitization. 10. What is quenching? 11. What is fluorescence? 12. What is phosphorescence? 13. What is IC and ISC? 14. What is chemiluminescene? 15. What is meant by the term absorption spectroscopy? 16. Differentiate chromophores and auxochromes with examples. 17. What are the various types of electronic transitions? 18. What is finger print region? Mention its important uses? 19. Define the term Bathochromic Shift. 20. Calculate the energy per mole of light having wavelength of 85 nm. Prepared by: Mr.. ayapra ash Page 1
6 PART-B (16 MARKS) 1. (i) With the help of jablonski diagram, explain the radiative and non-radiative pathways for an electronic transition. (ii) How quantum efficiency is determined experimentally? Explain. 2. (i) Distinguish between (a) Fluorescence and Phosphorescence (b) Thermal and photochemical reactions (ii) Define and mention reason for high and low quantum yield? 3. (i) Explain the statement, derivation and the limitations of Beer-lambertz law? (ii) A monochromatic light is passed through a cell of 1 cm length. The intensity is reduced by 10%.If the same radiation is passed through the same solution in a cell of length 8 cm, what is the transmittance? Calculate the length of the cell in order to have 20% absorption.i0 = 100%, I=90% because reduction in intensity is 10%. 4. (i) Explain the Chemiluminescence and Photosensitization with suitable examples. (ii) Calculate the energy associated with (a) one photon, (b) one Einstein of radiation of wavelength 8000 Å. 5. (i) (a) How do atomic spectra differ from molecular spectra? (b) How do emission spectra differ from absorption spectra? (ii) What are electromagnetic spectrum and explain the characteristics of it. 6. (i) Explain in detail about the Rotational, Vibrational and Electronic transitions. (ii) Explain the various changes occurring during absorption of radiation and what are the factors affecting it. 7. (i) Explain the principle of IR spectroscopy and discuss the functions of various components in IR spectrophotometer. (ii) Discuss the applications of IR spectroscopy. 8. (i) Discuss the principle, instrumentation and working mechanism of UV-Visible spectroscopy. (ii) Discuss the applications of UV-Visible spectroscopy. 9. (i) Write a note on a) Finger print region b) Phosphorescence. (ii) Explain the types of stretching and bending vibrations with suitable examples. 10. (i) State the following (a) Hypsochromic shift, (b) Hyper chromic shift, (c) Hypochromic shift, and (d) Bathochromic shift (ii) Differentiate Chromophore from Auxochrome. Prepared by: Mr.. ayapra ash Page 2
7 VALLIAMMAI ENGINEERING COLLEGE DEPARTMENT OF CHEMISTRY CY6151- ENGINEERING CHEMISTRY-1 UNIT-4 PHASE RULE AND ALLOYS PART-A (2 MARKS) 1. Define phase. In what way does it differ from state of matter? 2. Define a component. In what way does it differ from a constituent? 3. Define degree of freedom. What is the degree of freedom of a given quantity of a gas? 4. Calculate the no. of phases of the following i) Sulphur(monoclinic) Sulphur (rhombic) Sulphur (liquid) ii) Water + Alcohol Vapour 5. Calculate the degree of freedom for 6. Calculate the no. of components i) CuSO 4.5H 2 O(s) CuSO 4.H 2 O(s) + 4H 2 O(v) ii) PCl 5( s) PCl 3( v) + Cl 2 (v) 7. What is phase rule? Explain. 8. State the merits and demerits of phase rule. 9. What is condensed phase rule? State its significance. 10. What is meant by triple point? State its characteristics. 11. What is eutectic point? Mention its characteristics. 12. What is the difference in the phase diagram of a system forming simple eutectic and compound formation? 13. What is thermal analysis? Mention its uses. 14. Mention the differences between triple point and eutectic point. 15. Distinguish melting point, boiling point and triple point. 16. What is congruent melting point? Give an example. 17. What is an alloy? Give example for ferrous and non ferrous alloy. 18. Give the composition and uses of brass and bronze. 19. State the significance of increasing the carbon content in steel. 20. Write the composition of Dutch metal and Gun metal? Prepared by: r.. e ara ephen & Mr.. Ari a agan Page 1
8 PART-B (16 MARKS) 1. (i) State Phase rule and explain the terms involved in it. (ii) Explain thermal analysis. Mention its uses. 2. (i) Draw a neat one component water system and explain in detail. (ii) Describe Pattinson s process of desilverisation of lead. 3. (i) Discuss the phase diagram of a two component system with congruent melting point. (ii) Explain the heat treatment processes, i) Annealing ii) Tempering iii) Hardening. 4. (i) Explain the lead silver system with a suitable phase diagram. (ii) Explain the heat treatment processes, i) Nitriding ii) Normalizing iii) Carburizing. 5. (i) Draw a neat Zn-Mg system and explain in detail. (ii) What are the types of alloys? Discuss the purpose of making alloys. 6. (i) Discuss the effect of Ni, Cr and Mn in the alloying of steel. (ii) Discuss a) Heat resisting alloy steel, b) Magnetic steel 7. (i) What is stainless steel? Describe the different types of stainless steel. (ii) What are Non-ferrous alloys? What are its applications? Write about any two Non-ferrous alloys. 8. (i) Discuss Nichrome with its composition and applications (ii) What are ferrous alloys? Give their properties 9. (i) Discuss the composition, properties and uses of any two ferrous alloys. (ii) Mention the limitations of Phase rule. 10. (i) What is condensed phase rule? What is the number of degrees of freedom at the Eutectic point (ii) Discuss the composition, properties and uses of various types of Brass and Bronze. Prepared by: r.. e ara ephen & Mr.. Ari a agan Page 2
9 VALLIAMMAI ENGINEERING COLLEGE 1. What is nanochemistry? DEPARTMENT OF CHEMISTRY CY6151- ENGINEERING CHEMISTRY-1 UNIT-5 NANOCHEMISTRY PART-A (2 MARKS) 2. What are the differences between nanomaterials and bulk materials? 3. What is meant by size dependent property of nanoparticles? 4. What are nanowires? 5. What are nanoclusters? 6. What are nanorods? Mention their specific applications. 7. Write any four nanomaterials. 8. Mention some characteristic properties of nonmaterials? 9. Mention a few applications of nanomaterials. 10. What are carbon nanotubes? 11. Distinguish between Single-walled carbon nanotube (SWCNT) and Multi-walled carbon nanotube (MWCNT). 12. What is laser ablation? 13. Write note on Chemical Vapour Deposition (CVD). 14. Write note on Electro-Deposition. 15. Write the applications of nanowires and nanoclusters. 16. How nanoparticles prepared by precipitation method?. 17. What is the role of CNT in the H 2 O 2 fuel cell? 18. What are the applications of nanomaterials in Electronics? 19. Distinguish between top-down and bottom-up approach in the preparation of nanomaterial. 20. Write short note on Hydrothermal and Solvothermal synthesis of nanoparticles. PART-B (16 MARKS) Prepared by: r. M. ndarra an & r.. Krishnar hi Page 1
10 1. (i) Discuss the size dependent properties of nanomaterials. (ii)distinguish molecules, nanoparticles and bulk materials. 2. (i) Explain laser ablation method of preparing nanoparticles. (ii) Discuss precipitation process with example in preparing nanoparticles. 3. (i) Describe the hydrothermal synthesis of nanoparticles. (ii) Explain solvo thermal process for the preparation of nanoparticles. 4. (i) Discuss the electrical properties of CNTs. (ii) Discribe the synthesis, properties and applications of carbon nanorods. 5. (i) Write note on carbon nanotubes and its properties? (ii) Discuss Chemical Vopour Deposition (CVD) method for the synthesis of nanomaterials. 6. (i) Explain Electo-deposition method for the synthesis of nanomaterial. (ii) Discuss the vibrational properties of CNTs with suitable diagram. 7. (i) What are nanoclusters and nanowires? Explain their properties and applications. (ii) Discuss various types of synthesis involved in the preparation of nanomaterials. 8. (i)how are carbon nanotubes are synthesized explain in detail. (ii) Explain various applications of carbon nanotubes. 9. (i) Explain the various properties of nanomaterials. (ii) Explain top down and bottom up approach for nanomaterial preparation with examples. 10. (i) Outline medicinal and industrial application of nanomaterials. (ii) Give an account of electronics and biomaterials applications of nanomaterials. Prepared by: r. M. ndarra an & r.. Krishnar hi Page 2
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