Question Bank Physical Chemistry & Material of Construction (CH-4-G) 1.Thermodynamics

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Leonard Manning
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1 Question Bank Physical Chemistry & Material of Construction (CH-4-G) 1.Thermodynamics 1. Define the following terms and give its example I. System II. Surrounding III. Boundries IV. Homogeneous system V. Heterogeneous system 2. Difference between system and surrounding 3. State and explain difference types of thermodynamic system 4. State the use of thermodynamic principle 5. Distinguish between open and closed system.state whether the following systems are open or closed? I. A tabular reactor II. A batch reactor III. Individual phase in a multiphase reactor 6. How would you define extensive and intensive properties? State whether the following properties are extensive or intensive I. Volume. II. Density III. Specific volume IV. Heat capacity V. Specific heat VI. Potensial energy VII. Pressure VIII. Temperature 7. Explain steady and unsteady state condition 8. What do you mean by equilibrium state? Explain in your own words. 9. Explain temperature and its functions in thermodynamics 10. Explain in detail Entropy 11. State Kelvin Plank and Calius statement 12. What is an internal energy? 13. Define (1) Pressure, (2)Volume 14. State the 1 st law of thermodynamics 15. Define and explain (1) 2 nd law (2) 3 rd law (3) 0 th law 16. Give an expression for enthalpy 17. Difference between adiabatic and isothermal process 18. Define Reversible & Irreversible process. Give one example of each. 19. State first law of Thermodynamics. Give its mathematical equation. 20. Calculate w & ΔU for the conversion of 1 mol of water at 100ºc to steam at 1 atm preaaure. Heat of vaporization of water at 100ºc is J mol ¹ 21. Name any three application of polypropylene as material of construction.

2 22. Explain why gold does not corrode. 23. Give any three properties of cast iron 24. Define a) electrode potential b) galvanic series c) electrochemical series 25. Define adiabatic & isothermal process 26. State zeroth law of thermodynamics 27. Derive equitation for work done in isothermal expansion of ideal gas. 28. Differentiate between intensive & extensive properties ( any 4 points) 29. Calculate q, w, ΔU & ΔH for the isothermal expansion of 1 mol of an ideal gas at 27 ºc from a volume of 10 m³ to 20 m³, against a constant external pressure of 1 atm. 30. Define enthalpy, entropy, internal energy & PV work 31. Differentiate between a) reversible & irreversible process b)open & closed system a. 1 mol of an ideal gas is heated from 100ºK to 300ºK.Calculate ΔS if a) the volume is kept constant b) the pressure is kept constant. Assume that Cv = 1.5R 32. Define system & surrounding. What do you mean by isolated system? 33. State first & third law of thermodynamics. Also give their mathematical expression. 2. CORROSION OF ERROSION 1. What is the corrosion? 2. Explain the atmospheric corrosion. 3. Define the electrolyte. 4. Explain the immersed corrosion. 5. Described the electro potential with fig. 6. What is the electro chemical series? 7. Write any 4 electro chemical series. 8. Explain the 1 type of mechanism of wet, with diagram. 9. What is the most common mechanism by which corrosion occurs? 10. Explain how corrosion may occur by direct chemical attack? 11. Name the types of coating used with example for the prevention corrosion. 12. Discuss the factor of atmospheric corrosion. 13. Name some typical corrosion-resistant metal. 14. What is the electroplating? 15. Draw diagram of electroplating. 16. What the propose of electroplating on metal? 17. What is the purpose of electroplating on non-metal? 18. What is the metal cladding?

3 19. Write application of metal cladding. 20. Give any 2 advantages and disadvantages of metal cladding. 21. What is the erosion corrosion? 22. Define the liquid metal corrosion. 23. Define the hydrogen embrittlement. 24. Define the stable oxide film. 25. What is the oxidation corrosion? 26. List corrosion prevention methods. Explain any one of them. 27. Define corrosion inhibitors. List any four corrosion inhibitors. 28. Explain how oxide film plays an important role in atmospheric corrosion. 29. Explain the mechanism of dry corrosion 30. Give any four characteristics of corrosion protective coatings 31. Explain impressed current method of cathodic protection. 32. Explain electroplating with neat sketch 33. Give the importance of lining. ( any 4 points) 34. Name the two situations each where galvanic & uniform corrosion occurs. Q: 1 Attempt the following. (Short Answers) 3. ADSORPTION AND COLLOIDS 1. Write a short note on Adsorption? 2. Define the terms Adsorbate and Adsorbent. Give examples to illustrate. 3. Name the types of adsorption. 4. What do you understand by the term colloid? Give any Two examples. 5. Describe any two methods for preparation of colloidal solutions. 6. Name the different types of adsorption isotherms. 7. How does Adsorption differ from Absorption? 8. Mention the general methods of preparation of colloids. 9. What is Adsorption Isotherm? 10. Define: i. True solution ii. Suspension 11.Define Adsorption. 12.Define colloidal solution. Q: 2 answer the following questions. ( long answer types) 1. Derive Freundlich adsorption isotherm. 2. Derive Langmuir adsorption isotherm. 3. Give applications of adsorption. 4. Explain the terms physical adsorption and chemical adsorption. Illustrate with a specific example. 5. Compare physical and chemical adsorption. 6. Give classification of colloids.

4 7. Give the properties of colloidal solution. 8. Explain the application of colloids. 9. Describe the any two methods of preparation of colloids. 10. Explain what happens when: i. A beam of light is passed through a colloidal solution. ii. A colloidal solution is kept under an electrical field. iii. An electrolyte is added to a colloidal solution. Explain Freundlich Adsorption Isotherm Differentiate between physical & chemical adsorption.(any four points) 11. Define Isothermal & Adiabatic process with suitable example. 12. Explain any one method of preparation of colloids 13. Explain electrochemical method for protection of corrosion. 14. Explain dispersion method for preparation of colloidal solution. 15. Differentiate between Lyophilic & Lyophobic solutions 16. Explain Freundlich Adsorption isotherm 17. Differentiate between physical & chemical adsorption. 18. Explain with sketch, working of galvanic cell. 19. Explain any four applications of adsorption 20. Explain bridge arc method for preparation of lyophobic sols. 4. PHASE RULE 1. State the phase rule. 2. Explain the phase in detail. 3. What is the component? Give its example. 4. What is the phase diagram? 5. Explain the sulphur diagram. 6. Explain the water system with diagram. 7. Explain the three case of one component system. 8. Draw the typical phase diagram. 9. Explain the term of degrees of freedom. 10. What is the Gibbs phase rule? 11. Defined the polymorphism. 12. Define phase, component & Degree of freedom 13. Draw neat diagram of sulphur system i. Define degree of freedom. ii. What do you mean by passivity. 14. Determine the Degree of freedom for following systems a))liquid ammonia in equilibrium with its vapours b)aqueous solution of NaOH 15. Draw the neat phase diagram of water system. 16. Give the mathematical statement of Gibbs phase Rule & the terms involved in it.

5 5. Material of construction 1. Give the classification of engineering materials. 2. Give any four properties and uses of mild steel. 3. Give any four properties and two uses of SS Give any four properties and two uses of SS Give any four properties and two uses of SS Give any four properties and two uses of PP. 7. Give any four properties and two uses of PTFE. 8. Give any four properties and two uses of HDPE. 9. Give the composition and any four properties of SS Give the composition and any four properties of SS Give the composition and any four uses of grey cast iron. 12. List any four properties of Aluminium & state it s application. 13. Suggest a suitable material of construction for a storage tank of a) commercial grade sulfuric acid b) hydrochloric acid c) caustic lye (45% NaOH) d) acetic acid e) fuming nitric acid 14. Give the composition of duralumin & also give its two industrial uses 15. Explain method of glass lining on mild steel 16. Give two industrial uses each of SS314 & PVC. i. Define electrode potential of metal. ii. Name the elements used for alloying aluminium 17. State properties of Teflon & give its two industrial applications. 18. Explain in brief electrochemical series of metals 19. Explain the classification of engineering materials. 20. Explain in brief lead lining & state its purpose. 21. Name any two industrial applications each of SS304 & SS314 as material of construction a. Write names of material of construction for storage of a) HNO₃ acid upto its B.P. b) CH₃COOH c) C₂H₅OH d) Caustic soda. 22.Give any four properties of mild steel.

Unit - 3 ELECTROCHEMISTRY VSA QUESTIONS (1 - MARK QUESTIONS) 3. Mention the purpose of salt-bridge placed between two half-cells of a galvanic cell?

Unit - 3 ELECTROCHEMISTRY VSA QUESTIONS (1 - MARK QUESTIONS) 3. Mention the purpose of salt-bridge placed between two half-cells of a galvanic cell? Unit - 3 ELECTROCHEMISTRY 1. What is a galvanic cell? VSA QUESTIONS (1 - MARK QUESTIONS) 2. Give the cell representation for Daniell Cell. 3. Mention the purpose of salt-bridge placed between two half-cells