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

Engineering Chemistry - Dec 2014

First Year Engg (Semester 2)

(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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