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ENGINEERING CHEMISTRY( 18BSBH12 )

UNIT – I: WATER QUALITY AND ITS TREATMENT

LIST OF 10 MARKS QUESTIONS

  1. (a) What is mean by hardness of water? How is it classified? Mention the dis-advantages of using hard water for domestic purpose.

(b) Calculate temporary and permanent hardness of water sample collected in Chittoor district. The analysis of water is Ca(HCO3)2=16.2ppm, Mg(HCO3)2=14.6ppm, CaSO4=13.6ppm, MgSO4=12ppm, MgCl2=9.5ppm

  1. Write short notes on:

(a) Priming and Foaming

(b) Phosphate Conditioning

(c) Caustic Embrittlement

  1. (a) Mention the dis-advantages of using hard water for various industries.

(b) What is the role of buffer solution in EDTA titrations?

(c) Write the structure of EDTA and its reaction with calcium and magnesium.

  1. (a) Explain the principle involved in the estimation of dissolved oxygen in water samples.

(b) Give detailed procedure for the determination of dissolved oxygen in water.

  1. (a) What are the chemical reactions takes place in boiler corrosion?

(b) Write a note on scales and sludges in boilers.

  1. What is the principle of EDTA method? Explain the estimation of hardness of water by complexometric method.

  2. Describe the basic principle involved in the estimation of alkalinity of water and give detailed procedure for the estimation of alkalinity of water.

  3. What is meant by sterilization of water? Explain how sterilization of water is carried out by using chlorine and ozone.

  4. What are ionic exchange resins? How will you purify water by Ion-exchange process and explain the advantages over other methods.

  5. Write note on the following:

(a) Reverse osmosis in the purification of water

(b) Desalination of Brakish water by Electrodialysis.

  1. Describe the principle and procedure involved in the zeolite process for the treatment of water. What are the advantages and disadvantages of the zeolite process?

LIST OF 2 MARKS QUESTIONS

1. Which salts caused to temporary and permanent hardness?

2. Why do we express hardness of water in terms of CaCO3 equivalents?

3. Why do we add buffer solution the estimation of hardness of water?

4. Write the structure of EDTA?

5. What are the industrial methods used for softening of water?

6. Write briefly on chlorination of water?

7. Explain the role of nascent oxygen in ozonization.

8. Write the differences between scale and sludge?

9. What are the advantages and disadvantages of ion exchange process?

10. Define sterilization and name three methods.

11. Define priming and foaming.

12. Define ppm.

13. What are the advantages of reverse osmosis method?

14. Why is EDTA used in the estimation of harness of water?

15. What are the important parameters of water quality?

16. What is brackish water? What type of method is used for its purification?

17. Define alkalinity an acidity.

18. Write the chemical equations of the determination of dissolved oxygen by winkler’s method?

19. What is calgon conditioning?

20. What is caustic embrittlement?

UNIT – II: MOLECULAR STRUCTURE & THEORIES OF BONDING

LIST OF 10 MARKS QUESTIONS

  1. What is meant by crystal field splitting? Discuss the splitting of d-orbitals in case of octahedral Complexes.

  2. (a) Explain the salient features of crystal field theory in the formation of complexes.

(b) Discuss the splitting of d-orbitals in case of tetrahedral complexes by taking one example.

  1. (a) Write the important conditions required for the linear combination of atomic orbitals (LCAO) to form molecular orbitals.

(b) Draw molecular orbital diagram for N2 molecule.

  1. (a) Give salient features of Molecular orbital theory. Write molecular orbital energy level diagram of H2 +.

  2. Give the molecular orbital energy diagram of N2 and O2. Calculate the respective bond order. Write the magnetic nature of N2 and O2 molecules.

  3. Explain the formation of π-molecular orbital energy diagram of the following compounds

(a) 1,3-Butadiene (b) Benzene

  1. (a) Explain the formation of π-molecular orbital energy diagram of CO2.

(b) [Fe(CN)6]4- is diamagnetic while [Fe(H2O)6]2+ is paramagnetic. Justify

LIST OF 2 MARKS QUESTIONS

  1. Define bonding molecular orbital.

  2. Define antibonding molecular orbital.

  3. Explain diagrammatically the formation of molecular orbital by LCAO.

  4. Why are bonding molecular orbitals more stable than antibonding molecular orbitals.

  5. Give reason why H2+ ions are more stable than H2 ions though they have the same bond order.

  6. What’s difference between lone pair and bonded pair of electrons?

  7. Define atomic orbital and molecular orbital.

  8. Define the term bond order. Give its formula.

  9. What is meant by crystal field splitting?

  10. What are the rules to be followed for the filling of molecular orbitals?

  11. Differentiate between bonding and anti bonding molecular orbitals.

  12. Write the differences between molecular orbital and atomic orbital.

UNIT – III: ELECTROCHEMISTRY & CORROSION

LIST OF 10 MARKS QUESTIONS

  1. (a) Discuss the titration curve obtain in conductometric titration of weak acid and strong base.

(b) What are the advantages and limitations of conductometric titrations?

  1. (a) What is meant by galvanic cell? Explain the construction & working of a galvanic cell.

(b) What is meant by conductometric titrations? What is the basic principle involved in it.

(c) Discuss the titration curve obtain in conductometric titration of strong acid and weak base.

3.(a) What is electrochemical series? Discuss the important applications of electrochemical series. (b) Describe the construction and working of calomel electrode and quinhydrone electrode.

4. Explain the principle involved in fuel cell. Describe the construction and working of Hydrogen-Oxygen fuel cell (H2-O2) & PEM fuel cell. What are its advantages and disadvantages?

  1. (a) Discuss the working principle of the primary batteries (Lithium Batteries).

(b) Describe the construction and working of Solid oxide fuel cell.

  1. Write short notes on:

(a) Lead acid Batteries (b) Lithium-Ion Batteries

  1. (a) What is electrochemical corrosion and how does it occur? Describe the mechanism of electrochemical corrosion (Wet corrosion).

(b) Differentiate between dry corrosion and wet corrosion.

  1. (a) Define the corrosion and explain with suitable examples.

(b) What is oxidation corrosion and how does it takes place? Describe the mechanism of Oxidation Corrosion (Dry corrosion).

  1. Describe the various factors influencing the rate of chemical corrosion.

  2. (a) Two dissimilar metals are connected and exposed the electrolyte (Galvanic Corrosion).

(b) Define corrosion and explain Pilling-Bedworth rule.

  1. (a) A metal is exposed to varying aeration (Differential aeration corrosion).

(b) Describe the cathodic protection of corrosion control.

  1. (a) Write a short note on Electroplating of Copper and Chromium.

(b) Write a note on evolution hydrogen type of corrosion with mechanism.

LIST OF 2 MARKS QUESTIONS

  1. What is an electrochemical cell? Give an example.

  2. What is Nernest equation?

  3. What is primary battery? Give an example.

  4. What is secondary battery? Give an example.

  5. What is fuel cell? Give an example.

  6. Differentiate between the primary and secondary batteries.

  7. Explain the basic principle involved in fuel cells.

  8. What are the limitations of H2-O2 fuel cell?

  9. Why zinc is coating on Iron is called sacrificed anode?

  10. What is the chemical formula of rust?

  11. Define Electroplating.

  12. Distinguish between dry and wet corrosion.

  13. What is Pilling-Bedworth rule?

  14. What are the factors that influence the rate of corrosion?

  15. What is meant by sacrificial anodic protection?

  16. What is meant by impressed current cathodic protection?

UNIT – IV: STEREOCHEMISTRY, REACTION MECHANISM & SYNTHESIS OF DRUG MOLECULES

LIST OF 10 MARKS QUESTIONS

  1. Write an essay about types of organic reactions. Explain them by giving suitable examples to each reaction.

  2. (a) Explain enantiomers and diastereomers with one example?

(b) What is Absolute configuration? Give one specific example.

  1. Explain the mechanism of SN1 and SN2 reactions in alkyl halides.

  2. Explain substitution and elimination reactions with suitable examples and mechanism.

  3. Explain Markonikoff’s and Anti-Markonikoff’s rule with suitable example and mechanism.

  4. What do you mean by Isomerism? What are the types of isomerism?

  5. Explain Isomerism. Give classification of structural isomerism with examples

  6. Write a note on:

(i) Dehydrohalogenation of alkylhalides (ii) Markonikov’s rule

  1. (a) Draw all possible isomers of the compound having molecular formula C3H6O and C3H8O.

(b) (i) Oxidation of alcohols using KMnO4 (ii) Reduction of carbonyl compounds using NaBH4

  1. Give an account of: (i) Optical Activity (ii) Enantiomers

  2. Describe the structure, synthesis and pharmaceutical applications of Aspirin.

  3. Explain centre of symmetry, plane of symmetry and axis of symmetry with suitable examples.

LIST OF 2 MARKS QUESTIONS

  1. What are Nucleophilic reactions?

  2. What is Markonikov’s rule and give an example?

  3. What are Electrophilic reactions?

  4. Define Substitution reaction.

  5. What is meant by oxidation and reduction reactions?

  6. Define the term enantiomers.

  7. Define absolute configuration.

  8. Define the term optical activity.

  9. Define the term diastereomers.

  10. Define chiral centre with suitable examples.

  11. Define a symmetric carbon atom.

  12. What are elimination reactions?

  13. What is meant by symmetry?

  14. Write the structure of Aspirin.

  15. What are the pharmaceutical applications of Aspirin?

UNIT – V: SPECTROSCOPIC TECHNIQUES AND APPLICATIONS

LIST OF 10 MARKS QUESTIONS

  1. Explain the Basic principle and applications of UV-Vis Spectroscopy.
  2. Explain the Basic principle and applications of FT-IR Spectroscopy.
  3. (a) Explain the principle of NMR spectroscopy.

(b) Write short note on Ultraviolet spectroscopy.

  1. Explain the Basic principle and Specific applications of 1HNMR Spectroscopy.
  2. Explain the Basic principle and Specific applications of X-ray Diffraction Spectroscopy.

 

LIST OF 2 MARKS QUESTIONS

  1. Define the term spectroscopy.

  2. Define the terms chromophore and auxochrome.

  3. Define Infra-red spectroscopy. What is the range of Infra-red radiation?

  4. Define the term chemical shift.

  5. Define the term coupling constant.

  6. What is visible radiation?

  7. Give the applications of electronic spectroscopy.

  8. Write any three applications of 1HNMR spectroscopy?

  9. Give any four applications of IR spectroscopy.

  10. What is nuclear magnetic resonance?

  11. Give any four applications of X-ray Diffraction Spectroscopy.