Engineering FE Engineering Common Sem 1 2022 December 2022 R 16 Applied Chemistry I Question Paper - Mumbai University | munotes

Questions asked in this paper

1. Q2 Attempt any three questions from the remaining questions
2. Q3 All questions carry equal marks
3. Q4 Atomic weights:
4. Q1 Attempt any five of the following: - 15 marks
   • a. Differentiate between COD and BOD?
   • b. Give the preparation, properties and uses of Kevlar
   • c. of sample of waste water was refluxed with 30ml of potassium dichromate solution and after refluxing the excess unreacted dichromate required 23 ml of 0.1M FAS solution. A blank of distilled water on refluxing with 30ml of dichromate solution required of 0.1 M FAS solution. Calculate the COD value of the waste water
   • d. Define Cloud point and Pour point. Discuss its significance
   • e. State the limitations of phase rule?
   • f. What are the drawbacks of Natural Rubber?
   • g. List the applications of carbon nanotubes
5. Q2 a. Calculate the amount of lime (85% pure) and soda (95%) required for softening of one million liters of hard water whose chemical analysis results are given below: MgCO; = 8.4 mg/L, CaCl, = 22.2 mg/L,
   • b. (i) What are plasticizer and give its functions? 3
   • (ii) What are the conditions under which semi-solid lubricants are used. 2
   • C. Explain with the help of chemical reactions ‘setting and hardening ‘process of cement. 4
6. Q3 a. Define Fabrication of plastic. Explain Transfer moulding with labelled diagram. 6 marks
   • b. (i) Define Phase, Component and Degree of Freedom. 3 (i1) How is mixing of raw materials done by dry process. 2
   • C. 800 liters of hard water was made soft with zeolite. The exhausted zeolite required a total 4 amount of 40 liters of NaCl solution containing 110 gm per liter for regeneration. Calculate the hardness of water
7. Q4 a. Explain Demineralization of water by Ion Exchange method 6 marks
   • b. (i) Find acid value of vegetable oil whose requires of N/100 KOH during lubrication. 3 (Density of oil= 0.92 g/ml)
   • (11) Write a note on Deccay of concrete. 2
   • c. Thermosetting polymers cannot be reshaped and reused. Give reasons. 4
8. Q5 a. (i) Write short notes: a) Glass transition temperature b) Conducting polymers 6 marks
   • b. () What happens when temporary hard water is boiled? Give equations to explain. 3
   • (ii) Give the important functions of Lubricant. 2
   • c. Draw neat labelled phase diagram for water system. 4
9. Q6 a. What is Lubrication? Discuss the mechanism of Boundary film Lubrication 6 marks
   • b. (i) What is a condensed system? State the condensed phase rule equation. 3
   • (11) Distinguish between Hard water and Soft of water. 2
   • C. Describe the wet process for manufacture of Portland cement. 4

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