Cochin University of Science and Techology (CUST) 2007-1st Year B.Tech engineering chemistry - Question Paper

B TECH 1st YEAR MODEL exam
ENGINEERING CHEMISTRY Max marks:100
Time:3 Hrs

PART-A

1. a) discuss the Band Theory of solids.

b) provide a brief account on BET isotherm.

c) elaborate concentration cells? provide one eg

d) discuss the techniques to study fast reaction.

e) Derive the Kirchoff’s formula.

f) What is meant by chemical potential?

g) provide a short note on polymer additives.

h) discuss the manufacture , setting and hardening of port land cement.

PART-B

2. a) elaborate the polymer processing methods? define them.

b) elaborate nanometals & nanoceramics?

c) Mechanism of Lubrication.
OR
a) discuss the polymerization techniques.

b) provide a short note on 1) fullerenes & 2) optical fibres

c) elaborate the properties of a good refractory material?

3. a) Short note on a) Enthalpy b) Free energy c) Entropy

b) Derive the Gibb’s-Helmholtz formula.

c) Thermo dynamics of Bio chemical reactions.
OR
a) Derive an formula which indicates the variation of free energy with equilibrium
constant.

b) provide note on 1) Fugacity 2) Heat of reaction
c) How entropy modifications accompanies with an isobaric & isochoric process?

4. a) elaborate the various kinds of electrodes? provide example.

b) provide an formula relating activation energy & rate constant. discuss.

c)What are buffer solutions? provide eg.
OR
a) Derive the formula for the rate constant of a 2nd order reaction.

b) discuss the polarization of a voltaic cell.

c) elaborate secondary cells? discuss the working of lead acid cell.

5. a) elaborate liquid crystals? Write the application of liquid crystals.

b) Short notes on 1) Free electron theory 2) Fermi level in semi conductors.

c) elaborate converitional and organic superconductors?
OR
a) elaborate the laws of absorption. Explain?

b) Short notes on 1) Chromophores 2) Auxochromes 3) Blue shift 4) Red shift

c) discuss the metallic solids? elaborate its properties? provide eg.

Earning:   Approval pending.