Calicut University 2007-2nd Sem B.E Electronics and Instrumentation Engineering COMBINED FIRST ANDB.TECH.(ENGINEERING) -ENGINEERING CHEMISTRY - Question Paper

C 31701

COMBINED 1st AND 2nd SEMESTER B.TECH.(ENGINEERING) DEGREE EXAMINATION,JUNE 2007.
Chemistry (EN 04-104 A)

ENGINEERING CHEMISTRY (A)

Time:Three Hours Maximum:100 Marks

Part A

ans all ques.

I.

a) With the help of a diagram, define the crystal structure of NaCl.

b) Write a note on superconductors.

c) List out the differences ranging from LDPE and HDPE.

d) What is meant by compounding of plastics?

e) What are the characteristics of a Fuel cell?

f) What is standard electrode potential? discuss.

g) Describe galvanizing process and mention its application.

h) State the characteristics of a good point.

(8x5=40 marks)

II. A

a) Explain the difference ranging from cubic and hexagonal close packing.(8 marks)

b) What are the important features of solids. Distinguish crystalline solids from amorphous solids.(7 marks)

Or

B.

(a) Based on molecular orbital approach define in detail the band model of metallic bonding. On the basis of this model, how would you account for conductance, semiconductance and non-conductance of various material? (10 marks)

(b) Derive Braggs formula. (5 marks)

III. A

(a) Discuss the effect of structure of polymers on their physical properties in detail. (8 marks)

(b) Explain boundary-firm lubrication.(7 marks)

Or

B.(a) How is viscosity index computed for an unknown oil? (7 marks)

(b) Distinguish ranging from the subsequent with examples:

I. Natural and synthetic rubber.
II. Additional and condensation polymerisation. (8 marks)

IV.

A(a) Write the construction and working of a concentration cell.(8 marks)

(b) discuss the function of H2 –O2 fuel cell.(7 marks)

Or

B(a) provide a detailed account of Pogendroff’s compensation method.(8 marks)

(b) What is galvanic cell? How does it differ from an electrochemical cell? (7 marks)

V.

A(a)Describe briefly the important parameters involved in electroplating. discuss with example. (8 marks)

(b) discuss the preliminary treatment provided to a metallic surface before coatings. (7 marks)

Or

B(a) describe BOD. How is it determined experimentally? ( eight marks)

(b) Write a note on Green House effect. (7 marks)

(4x15 =60 marks)

Earning:   Approval pending.