Question Paper: Engineering Chemistry : Question Paper Dec 2014 - First Year Engineering (Semester 2) | Pune University (PU)
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Engineering Chemistry - Dec 2014

First Year Engg (Semester 2)

TOTAL MARKS: 50
TOTAL TIME: 2 HOURS
(1) Solve Q.1 or Q.2, Q.3 or Q.4, Q.5 or Q.6, Q.7 or Q.8
(2) Assume suitable data, if necessary.


Solve any one question from Q1 & Q2

1 (a) Define scale and sludge. Give the causes, disadvantages and removal of scale and sludge formation in boiler(6 marks) 1 (b) State and derive Beer Lamberts law.(3 marks) 1 (c) Define specific conductance, equivalent conductance and molar conductance.(3 marks) 2 (a) Explain the pH metric titration of - mixture of weak acid - strong acid against std. Alkali giving chemical reaction procedure with titration curve.(6 marks) 2 (b) What are merits of green synthesis and demerits of traditional synthesis of indigo dye.(3 marks) 2 (c) A water sample is non alkaline to phenolphthalein indicator. However, 100 ml of the same sample on titration with 0.02 N H2SO4 requires 14.5 ml of acid to obtain end point using methyl orange indicator. Identify type of alkalinity and determine its extent.(3 marks)


Solve any one question from Q3 & Q4

3 (a) Give preparation reaction, properties and uses of following polymers.
a) LDPE b) Styrene - butadiene rubber
(6 marks)
3 (b) What is biodiesel ? Give its synthesis and advantage.(3 marks) 3 (c) A gaseous fuel used in internal combusion engine contain CH4=45%, H2=30%, CO=20%, N2=5% by volume. Find the minimum quantity (volume) of air required for complete combusion of 1 M<sup3&lt; sup=""> of gaseous fuel.</sup3&lt;&gt;<>(3 marks) 4 (a) Draw neat labelled diagram and give the construction, working of bomb calorimeter to determine GCV of a fuel.(6 marks) 4 (b) Distinguish thermoplastic and thermosetting polymer with suitable example.(3 marks) 4 (c) What is biodegradable polymer? Give the structure of PHBV and its applications?(3 marks)


Solve any one question from Q5 & Q6

5 (a) Explain structure, properties and applications of fullerene.(5 marks) 5 (b) Explain industrial production of hydrogen by steam reforming of methane and coke.(4 marks) 5 (c) Explain the structure and properties of graphite.(4 marks) 6 (a) Give the isotopes of hydrogen with their applications and write the properties of hydrogen which makes it more difficult to store and transport.(5 marks) 6 (b) What are the types of CNTs with respect to their structure ? Give the applications of CNTs.(4 marks) 6 (c) Explain chemical storage method of hydrogen gas in the form of alanates and metal hydrides.(4 marks)


Solve any one question from Q7 & Q8

7 (a) Define corrosion and explain effect of following factors on rate of corrosion

i) Purity of metal
ii) Relative area of anode and cathode.
(5 marks)
7 (b) State the types of oxide film formed on the surface of following metals with reactions.
1) Na 2) Al 3) Au 4) Mo
(4 marks)
7 (c) What is cathodic coating ? Explain timing with neat labelled diagram to protect metal from corrosion.(4 marks) 8 (a) Explain electrochemical corrosion by H2 evolution and O2 absorption mechanism(5 marks) 8 (b) What is principle of cathodic protection and explain it with any one suitable method.(4 marks) 8 (c) Define electroplating. Explain electroplating process with neat labeled diagram and applications.(4 marks)

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