Engineering FE Engineering Common Sem 1 2018 December 2018 Applied Chemistry I Question Paper - Mumbai University | munotes
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Questions asked in this paper
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Q1 Question number is compulsory
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Q2 Attempt any three questions from Q.2 to Q.6
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Q3 Draw neat diagrams and write chemical equations where necessary
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Q4 Figures to right indicate full marks
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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
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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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