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Give any four properties of wlcanized rubber.(b) What is optical fibre ? Give three uses of it.(c) Explain homo polymer and co-polymer with one example for each.UNrr - IV(a) Compare solid, liquid and gaseous fuels.(b) Define pollutant. Explain the rnajor sources of water pollution.(c) What are primary flrels ? Give tlo examples. OrX (a) What do you urderstand by Green house effect ? What are its consequences ?Mention two ways to reduce it.(b) Give the major components present in the following fuels. Marks654 654 (i) LPG(ii) Producer gas (iv) Water gas(v) CNG (ii, Nahral gas(c) Write a shoft note on ozone Iayer depletion. 54 endstream endobj 23 0 obj 669 endobj 21 0 obj <> /Length 10682 >> stream NMC7ݯM M?^2V\-G c-4-!P~ÎG~+}q?AMcA+bl֭;2Uё.)r"Ԏ_H{k RD;-3`AA6G ]&3""h"*k>03TVJY"L=HAT<5¨RQ}qW2);p_߫>>8/׭:m/ r. 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Calculate the de-Broglie wave length for anelectron moving with a velocity of ld m stO=e.OZS x 16'J't 11* 1nu.'r.m=9. I x 10-3rrg;(b) State octet rule. Explain the bond formation in NaCl.(c) What is a co-ordinate bond ? Give two examples.On(a) state Heisenberg's uncertainty principle. Calculate the uncertainty in the velocityof an electron, if the unceftainty in position is l0-r0m.(h = 6.625 x l0-34Kg m2 s'r, m"= 9.1 x l0-3rKg)(b) How is a covalent bond formed ? Give ttree examples.(c) Differentiate between orbit and oftital. Uur - IIExplain the process of electrolysis by taking molten NaCl as an example.What is a salt bridge ? Give the functions of salt bridge.What are secondary cells ? Give two examples. On(a) What are the factors that influence rate of corrosion ? Explain.O) What is electrochemical theory of corrosion ?(c) How is corrosion prevented by cathodic protection method ? 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No. DIPLOMA EXAMINAIION IN ENGINEERING/TECHNOLOGYiMANAGEMENT/COMMERCIAL PRACTICE -APRIL, 20 1 9 ENGINEERING CHEMISTRY - II(Maximum marks : 100) lTime : 3 hotrs PART-A(Maximum marks : 10)Marks1 Answer a// questions in one or two sentences. Each question carries 2 marks.I . State Hund's rule of rnaximr.ul multipliciry2. What are strong electrolltes and weak electrolytes ?3. Give the flmctional group of(a) Ketone (b) Alcohol4. Define galvanization.5. Define calorific value of fuel. (5 x 2: l0)PART -B(Maximum marks : 30)II Answer any .five of the following questions. Each question carries 6 ma*s.l. (a) Explain hydrogen bonding with an example.(b) State Aufbau principle.2. (a) What is a primary cell ? Give two examples.(b) State Faraday's first law of electrolysis.:1. (a) Redrrction potentials of 7.n and Ag electrodes are -O 76 V and 0 8 Vrespectively.(i) Compute the emf if a cell is constructed using these electrodes.(ii) Which metal displaces the other from its salt solution ? Give reason.(b) Explain dry corrosion.4. (a) Distinguish between organic and inorganic comporurds.(b) Give monome(s) of ttre following polymers.(i) PVC (ii) Natural rubber5. (a) V,/hat is catalytic cracking ? 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