Applied Chemistry 1 - Dec 2016
First Year Engineering (Semester 1)
TOTAL MARKS: 60
TOTAL TIME: 2 HOURS (1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Use suitable data wherever required.
(4) Figures to the right indicate full marks.
Solve any five questionQ.1(a,b,c,d,e,f,g)
1(a) Define BOD and COD.(3 marks)
1(b) What are the drawbacks of natural rubber?(3 marks)
1(c) Distinguish between thermoplastic and thermosetting resins.(3 marks)
1(d) Define cloud point and pour point. Discuss its significance.(3 marks)
1(e) What are nano materials? Explain any two methods for synthesis of Nanoparticles.(3 marks)
1(f) List the applications of CNTs.(3 marks)
1(g) 25 ml of a seawage water sample was refluxed with 10ml of 0.25Nk2Cr2ON solution in presence of dil H2 SO4Ag2SO4 and HgSO4. The unrea cted dichromate required 5.5 ml of solution, under the same conditions. Calculate the COD of sewage water sample.(3 marks)
2(a) Calculate the amount of lime (85% pure) and soda (95% pure) required to soften one millon litres of water which contains MgCO3=84 ppm, CaCl2 =22.2 ppm MgCl2=9.5 ppm, CO2=33 ppm HC3l=7.3 ppm, kCl=-16.8 ppm.(6 marks)
2(b) State Gibb's phase rule . Give its applications to one component system.(5 marks)
2(c) What are the CNTs? Describe the laser method of preparation of CNT.(4 marks)
3(a) Define lubricant. Discuss the boundary film lubrication mechanism.(6 marks)
3(b) Explain compounding of plastics.(any five)(5 marks)
3(c) State the limitation of phase rule.(4 marks)
4(a) Give the preparation, and uses of (any two)
i) PMMA ii) Buna-s iii) Kevlar(6 marks) 4(b) With the help of neat and labelled diagram explain zeolite process for softening of water.(5 marks) 4(c) Find the acid value of oil whose 5 ml required 2ml. Of 0.01 N KOH during titration.(density of the oil=0.92)(4 marks) 5(a) Explain manufacturing of portland cement (wet process) with a labelled diagram of rotary kiln.(6 marks) 5(b) Explain the injection moulding method with the help of a neat diagram.(5 marks) 5(c) The hardness of 50,000 litres of water sample was removed by passing it through a zeolite softner. Then it required 200 litres of of NaCl soltution Calculate the hardness of water sample.(4 marks)
Solve any Two questionQ.6(i,ii,iii)
6(a)(i) Discuss the following treatment methods for municipal water.
Bleaching powder(3 marks) 6(a)(ii) Ozone(3 marks) 6(a)(iii) Chlorine(3 marks) 6(b) Discuss any two of the following:
i) Glass transition temperature
ii) Polymer in medicine and surgery
iii) Conducting polumers(5 marks) 6(c) Write a note on blended oil.(4 marks)