Applied Chemistry 1 - Dec 2012
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.
Answer any five of the following:-
1(a) Distinguish between BOD and COD. (3 marks)
1(b) Write synthesis, properties and applications of Kevlar.(3 marks)
1(c) Define and write significance of Viscosity and Viscosity Index.(3 marks)
1(d) State the limitations of phase rule.(3 marks)
1(e) What is nano material? Give two properties of nano materials which make them different and superior to conventional materials.(3 marks)
1(f) Write synthesis, properties and applications of Buna S.(3 marks)
1(g) Calculate temporary, permanent and total hardness of water sample containing
Mg(HCO3)2 = 7.3 ppm, Ca(HCO3)2 = 16.2 ppm, MgCl2 = 9.5 ppm, CaSO4 = 13.6 ppm(3 marks) 2(a) Calculate amount of lime (90%) pure and soda (98% pure) for the treatment of 1 million litres of water containing
Ca(HCO3)2 = 8.1 ppm, CaCl2 = 33.3 ppm, (HCO3)- = 91.5 ppm, MgCl2 = 38 ppm, Mg(HCO3)2 = 14.6 ppm. The coagulant Al2(SO4)3 was added at the rate of 17.1 ppm.(6 marks) 2(b) Define phase rule and explain terms like phase, component and degree of freedom by giving appropriate examples. (5 marks) 2(c) Explain manufacturing process for the portland cement.(4 marks) 3(a) What is lubrication? Explain fluid film lubrication with the help of diagram. (6 marks) 3(b) Write synthesis, properties and applications of silicon rubber. (5 marks) 3(c) Draw neat labelled phase diagram for water system. (4 marks) 4(a) What is fabrication technology? Mention various moulding techniques and explain injection moulding with the help of diagram.(6 marks) 4(b) Discuss zeolite process with the help of diagram, chemical reactions and advantages. (5 marks) 4(c) Find acid value of vegetable oil whose 5 ml requires 2 ml of N/100 KOH during lubrication (Density of oil is 0.92 g/ml).(4 marks) 5(a) What is SWCNT and MWCNT? Explain Laser method for the manufacturing of carbon nanotubes.(6 marks) 5(b) Write chemical reactions for manufacturing of phenol formaldehyde resin. Explain its applications and properties also.(5 marks) 5(c) The hardness of 100,000 litres of water completely removed by passing through zeolite softener, the softener then requires 400 litres of NaCl solution containing 100g/litre NaCl for regeneration. Calculate hardness of water sample. (4 marks) 6(a) Explain activated sludge process with the help of flow sheet diagram. (6 marks) 6(b) Write a note on compounding of plastic.(5 marks) 6(c) Write a note on blended oil. (4 marks)