SEMBODAI RUKMANI VARATHARAJAN ENGINEERING COLLEGE
DEPARTMENT OF SCIENCE AND HUMANITIES
QUESTION BANK
SUB CODE
: CY6151
SUB NAME
: ENGINEERING CHEMISTRY – I BATCH
STAFF NAME :Ms. G. SUTHA
BRANCH/YEAR/SEM: CE, CS, EE, EC &ME/ I / I
ACADEMIC YEAR
: 2015-2019
: 2015-2016 (ODD)
UNIT-I
POLYMER CHEMISTRY
PART-A
1. Define: Polymer & Polymerisation.
2. What are monomers?
3. What is hetero chain polymer & give one example?
4. Differentiate between thermoplastics and thermosetting plastics.
5. Define: Plastics & Mention few advantages and disadvantages of Plastics.
6. What are the oligo mers and high polymers?
7. Name some natural polymers & synthetic polymers.
8. Define: Tacticity and their types.
9. What are the types of ionic polymerisation?
10. What is the condition for cationic polymerisation?
11. What is the condition for anionic polymerisation?
12. Define: Glass transition temperature (Tg).
13. What are factors affecting Tg?
14. What is Number-Average molecular weight?
15. What is Polydispersity index?
16. List out the types of polymeric techniques.
17. What are the advantages of solution polymerisation?
18. Name some important applications of emulsion polymerisation?
19. What are Epoxy resin, Properties and Uses?
20. What are monomers used in Epoxy resin and Nylon 6,6?
21. What is copolymerization?
22. What is condensation polymerisation?
23. Define: Functionality.
PART-B
1.
2.
3.
4.
5.
6.
7.
8.
Distinguish between thermoplastics and thermosetting plastics.
Distinguish between addition & condensation polymerization.
Explain: Types of polymerization (Addition, Condensation & Copolymerisation).
Explain the free radical mechanism.
Explain: Cationic & Anionic mechanism with example.
Classify polymers with suitable examples.
Explain: Thermoplastics and Thermosetting plastics.
Briefly explain about various properties of polymers. ( Tg, tacticity, numberaverage , weight-average molecular weight & polydispersity index).
9. Briefly explain about various techniques involved in polymerizations ( Bulk,
emulsion, solution & suspension).
10. Write the preparation, properties & uses of Nylon 6,6 and Epoxy resin.
UNIT-II
CHEMICAL THERMODYNAMICS
PART-A
1. What are extensive and intensive properties of a system?
2. Distinguish between an adiabatic process and an isothermal process.
3. Distinguish between a reversible and an irreversible process.
4. State the first law of thermodynamics (or) What is the law of conservation of
energy?
5. What are the limitations of first law of thermodynamics?
6. State second law of thermodynamics.
7. Define: Entropy.
8. Define the term Spontaneous process.
9. Define: Spontaneity.
10. How does the entropy of the system change when a gas is liquified?
11. Give the mathematical expression for entropy. What is its unit?
12. Give the criteria for a reversible process and a spontaneous process in terms of
entropy.
13. Write briefly on the physical significance of entropy.
14. Why does entropy of a solid increase on fusion?
15. At absolute zero (0K), the entropy of a pure crystal is zero. Comment this
statement (or) Under what condition does the entropy of a substance become
zero.
16. Define: Entropy of vapourisation.
17. Define: Entropy of fusion.
18. Define the term Free energy.
19. Define: Work function.
20. Discuss the criteria for a chemical reaction to be spontaneous.
21. Define: An isolated system.
22. What is an open system?
23. Write Gibb’s-Helmoltz equation? What is its application?
24. What is the significance of free energy?
25. What is state function?
26. What is the entropy change in reversible and irreversible processes?
27. What is standard free energy change?
28. What is an isobaric process?
29. Write any to Maxell’s thermodynamic relations?
30. What do you meant by a thermodynamic system?
31. What is an isothermal process?
32. What do you mean by isochoric process?
PART-B
1. Derive an expression for expression for entropy change of an ideal gas at
constant temperature.
2. Derive Gibbs-Helmoltz equation and discuss its applications.
3. Discuss the criteria for a spontaneous chemical reaction.
4. What is meant by Van’t Hoff reaction isotherm? Derive an expression for the
reaction isotherm of the general reaction.
aA + bB ↔ lL + mM
5. What is meant by Van’t Hoff isotherm? Derive an expression for the isotherm of
the general reaction.
aA + bB ↔ cC + dD
6. Explain clausius-claperyron equation. Discuss its applications.
7. Derive all four Maxwell relations.
8. Explain the significance of Gibbs free energy.
UNIT-III
PHOTOCHEMISTRY AND SPECTROSCOPY
PART-A
PHOTOCHEMISTRY
1. What are Dark reactions?
2. Write the difference between photochemical and thermal reactions?
3. Define: Grotthus-Draper’s law.
4. State Stark-Einstein law of photochemistry.
5. Define: Beer-Lambert’s law.
6. What are the limitations of Beer-Lambert’s law.
7. Define: Quantum yield or Quantum efficiency.
8. What are the conditions for high and lo quantum yield?
9. What are the two photochemical process?
10. Define: Photo-sensitation,
11. What is quenching?
12. What is photochemical process?
13. What is photophysical process?
14. What is fluorescence?
15. How the photochemical reactions are classified based quantum yield?
16. What is phosphorescence?
17. What are the radiative and non-radiative transitions?
18. What is internal conversion and inter system crossing?
19. What is Chemiluminescence?
20. What is cold light?
SPECTROSCOPY
21. What is atomic spectroscopy?
22. What is a grating? How does it function?
23. What are the various types of electronic transition?
24. What are the monochromators used in UV-Visible spectrophotometer?
25. What is chromophore? Give an example.
26. What are Auxochrome? Give an example.
27. Define the term Bathochromic shift or Red shift.
28. Define the term Hypochromis shift or Blue shift
29. Why methanol is a good solvent for UV and not for IR?
30. Name the source of IR radiation in IR Spectrophotometer.
31. Write any to reasons for molecule is irradiated ith IR?
32. Write an applications of IR Spectroscopy?
33. What are finger print region in IR and its uses?
34. Calculate the number of modes of vibrations for a) CH4 b) CO2.
35. What happens when molecule is irradiated with UV-Visible radiation?
36. Write the applications of UV-Visible light?
37. How will you distinguish CH3COOH from CH3COCH3 by IR spectra?
38. What is electromagnetic spectrum?
PART-B
PHOTOCHEMISTRY
1. State and explain the laws of photochemistry in details.
2. Illustrate Stark-Einstein law of photochemical equivalence.
3. Define: Beer-Lambertz law. Prove that absorbance is directly proportional to
concentration. What are its limitations?
4. What is quantum yield? Explain the conditions and causes for low & high
quantum yield.
5. What are the types of photo physical process? Explain in details.
6. Explain the mechanism of fluorescence & phosphorescence.
7. With a Jablonski diagram, explain radiative and non-radiative pathways for an
electronic transition.
8. Explain the photo physical process with the help of Jablonski diagram.
9. What is chemiluminescence? Bring out the mechanisms of chemiluminescence.
10. Explain about chemiluminescence & photosensitation.
SPECTROSCOPY
11. Explain in details about the rotational, vibrational and electronic transitions.
12. Discuss the principle, construction and working mechanism of UV-Visible
spectroscopy and its applications.
13. Discuss the principle, construction and working mechanism of IR spectroscopy
and its applications.
UNIT-IV
PHASE RULE AND ALLOYS
PART-A
PHASE RULE
1. State Gibbs phase rule.
2. Define: Phase
3. Define: Component.
4. Define: Degree of freedom.
5. Give example for one component system.
6. Give example for two component system.
7. Give example for three component system.
8. What is phase diagram?
9. What is meant by a triple point in a phase diagram?
10. What is eutectic point?
11. State the condensed phase rule.
12. What do you mean an invariant and non-variant?
13. What is eutectic mixture?
ALLOYS
14. What is an alloy?
15. How alloys are classified and give one example for each?
16. Give the composition of Nichrome and Alnico.
17. What is the uses of Nichrome?
18. What are the Stainless steel and its type?
19. Why Stainless steel have more corrosion resistance?
20. What are non-ferrous alloys?
21. How non-ferrous alloys better than ferrous alloys?
22. Give the composition of Brass.
23. Give the composition of Bronze.
24. What are solders and give an example?
25. What are the limitations of phase rule?
26. Mention the application of phase rule.
27. What is meta stable equilibrium?
28. Mention some importance of alloying.
29. What is heat treatment of alloys?
30. What are the sailient features of heat treatment?
31. What is Quenching in heat treatment of steel?
32. What is annealing?
33. What is tempering?
34. What is Normalising?
PART-B
PHASE RULE
1.
2.
3.
4.
State phase rule & Explain the terms involved in it.
Discuss water system with neat diagram (one component system).
Discuss Pb-Ag system with neat diagram(two component system).
Discuss Zn-Mg system with neat diagram(two component system).
ALLOYS
5. What are the main purpose (or) significance of alloying steel?
6. Define the term Alloy and bring out the effect (or) function of alloying of metals
with examples.
7. Write notes on heat treatment of steel?
8. Give the composition and uses of the following alloys.
A) Ferrous alloys
i) Nichrome
ii) Stainless steel
B) Non-Ferrous alloys iii) Brass
iv) Bronze
.
UNIT-V
NANO CHEMISTRY
PART-A
1. What are nano particles?
2. How nano particles are classified?
3. What are nano materials?
4. What is nano chemistry?
5. What are physical methods used for synthesizing nano materials?
6. What is Chemical Vapour Deposition?
7. Distinguish between bulk particles and nano particles.
8. What is the basic principle involved in solvothermal synthesis of nano materials?
9. Define: Nano wires.
10. What are the characteristics of nano-wires?
11. Mention some important applications of nano-wires.
12. What is nano rod?
13. What is nano clusters?
14. What is magic number?
15. How are nano particles prepared by precipitation techniques?
16. What are CNTs?
17. Mention some uses of CNTs.
18. Mention some characteristic properties of nano materials.
19. List any four nano materials.
20. Mention three uses of nano rods.
21. Mention any four methods used to synthesis nano materials.
22. Mention the various fields in which nano materials are used.
PART-B
1. Distinguish between Molecule, Nano particle & Bulk materials.
2. Explain the terms: Nano rods, Nano tubes, Nano wires and Nano clusters.
3. How will you synthesis nano material by Top-down approach methods?
i)Pulsed laser ablation(PLD) ii) Chemical vapour deposition(CVD)
iii) Electro deposition
4. How will you synthesis nano material by Bottom-up approach methods?
i)Thermolysis(Hydro thermal & Solvo thermal) ii) Precipitation
5. Define: Carbon nano tubes (CNTs) and Explain classification (or) structure of
Carbon nano tubes.
6. How will you synthesis Carbon nano tubes (CNTs) by the following methods?
i)Arc discharge method
ii) Laser ablation
iii) Chemical vapour deposition iv) Pyrolysis.
7. Write the aplications of Carbon nano tubes(CNTs)?
…..ALL THE BEST…..