Mumbai University Previous year question papers
I Year Examination June 2008
(1) Question No.1 is compulsory.
(2) From remaining six questions attempt any four.
(3) Figures to the right indicllte full marks.
(4) All questions carry equal marks.
1.Attempt any five from the following
(a) Define corrosion? List the various types of corrosion.
(b) Write cOrTlpositionproperties and uses of Duralumin?
(c) Define fuels? Classify fuels with suitable example.
“(df Write the applications of composite materials.
(e) What is green chemistry? Listthe principles of green chemistry.
(f) What is catalyst? State the types of catalyst.
(g) Define the term calorific value and ignition temperature?
2(a) Distinguishbetween Galvanizingand Tinning.
(b)What is powder metallurgy? Howare metal powders prepared?
(c)the % composition of mass of a sample of coal is as follows.
C=80%, H=6%,0=8%, 5=1.5%, N=l%, ash = rest.
Calculatethe grossand net calorificvalueof Fuel.
3(a) Definecomposite material? Givethe classificationof composite materials? Explainlaminates.
(b) ExplainAdsorption theory of heterogeneous catalysis?
(c) What is cracking?Write advantages of catalytic crackingover thermal cracking?
4(a) Explainbasic ideas in the field of green chemistry research with the help of SynthesisOf indigodye?
(b)Acurrent of 2 Amp.was passed through a solution of copper sulphate for 16 minutes. Calculatethe amount of copper deposited on cathode?(Atomic.weight of Copper= 63)
(c) What is Bio-diesel?Explainthe method to obtain Bio-dieselfrom vegetable oil? Give advantages of Bio-diesel.
5(a) Write note on any two of the following.
i) Matric phase of composite material
(b) A’sample of coal contains C=65%, H=13%,0=6%,5=4%, N=2%, and ash= remaining. Calculatethe minimum amount of air needed for complete combustion of 1 Kg.of coal. 5
(C), Howare the followingfactors are responsible for the rate of corrosion?
(b) Relativeareas of anode and cathode.
ii)pH of the medium.
iii)Nature of surface film.
6(a) Explaintypes of catalysis with suitable examples.
(b) Write composition and uses of Wood’s metal.
(c) (i) What are the characteristics properties of -composite material?
(ii) What is pillard clays? State important properties of pillard clays.
Q. No.7 (a) Explainrefining of petroleum with suitable diagram.
(b) Write note on Atomization and Sintering.
(c) Define paints? State the characteristics of good paint.