Engineering FE Engineering Common Sem 1 Applied Chemistry Dec 2018 R16 Question Paper - Mumbai University | munotes

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Questions asked in this paper

Q1 Question number is compulsory
Q2 Attempt any three questions from Q.2 to Q.6
Q3 Draw neat diagrams and write chemical equations where necessary
Q4 Figures to right indicate full marks
Q1 Solve any five
- (a) the principle of EDTA method. 3
- (b) is glass transition temperature. Write its significance. 3
- (c) Write the significance of the following properties of lubricants: 3
- (d) is RCC? What are the advantages of RCC over concrete? 3
- (e) the reduced phase rule. 3
- (f) between thermoplastic and thermosetting polymer. 3
- (g) 20 ml of waste water was refluxed with 30 ml of potassium 3 dichromate solution and after refluxing the excess. unreacted dichromate required 11 ml of 0.1 N solution. Blank of 20 ml of distilled water on refluxing with 30 ml of dichromate solution required 14 ml of 0.1 N FAS solution. Calculate the COD value of wastewater
Q2 (a) of water contains following impurities: 120 mg/lit, mg/l and Ca (NO3)2=164 purity of lime is 74% and soda is 90%.Calculate the quantity of lime and soda needed for softening of 50,000 litres of water 6 marks
- (b) 1) Write a brief note on polymers used in medical field. 3 1i) Name two additives added in blended oils. Give one example of each. 2
- (c) Explain with the help of chemical reactions “ Setting and Hardening “ of cement. 4 What is fabrication of plastic? Explain injection moulding process with a neat diagram. 6 the advantages and limitations of phase rule. 3
- ii)Differentiate between SWNT and MWNT 2
- (c) A zeolite softener was completely exhausted and was regenerated by passing 1000 litres of NaCl solution, containing 100mg/lit of NaCl. How many litres of a sample water of hardness 500ppm can be softened by this softener? 4.(a) Draw the diagram for demineralization process and write suitable reactions involved 6 the process. What are the advantages and disadvantages of the method
- (b) i) Find the acid value of the given oil whose required of N/10 KOH during 3 titration. (Density of oil = 0.86g/ml) a short note on decay of concrete
- (c) Natural rubber requires vulcanization. Give reasons. With appropriate reactions explain 4 how the drawbacks are overcome? 5.(a) Write preparation, properties and uses of following polymers: (Any two) 6
- (b) Explain Activated sludge method with the help of diagram. 3 What is grease? What are the conditions in which greases are used? 2
- (c) Draw the phase diagram of one component system and find out the number of degree of 4 freedom along the curves and areas 6.(a) are lubricants? Define Explain Hydrodynamic lubrication 6 mechanism with neat diagram
- (b) Define a) Phase b) Component c) Degree of freedom 3
- ii) Write a short note on Reverse Osmosis. 2
- (c) Explain laser ablation method for production of CNTs. 4

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