Punjab Engineering College 2007 B.E Civil Engineering CHEMISTRY - Question Paper

B.Tech Civil Engineering CY 1101- CHEMISTRY- I ques. paper


First Semester
Civil Engineering
CY 1101- CHEMISTRY- I
(Common to all branches other than Marine Engineering)
(Regulation 2004)
PARTA-(10 x2=20 marks)

1.Define EMF of an electrochemicalcell.
2.What is Helmholtz work function, A?
3.Write the nuclear reaction of decay of Polonium?
4.Write the relationship which indicates the influence of temperature on reaction
rate.
5.What is Freundlich adsorption isotherm?
6.State Beer Lamberts iaw.
7.What are the different kinds of electronic transitions?
8.Mention any 2 advantagesof instrumental methods of anaiysis.
9.What is the entropy change for the conversion of one moie of liquid water at
100'C to steam at 100'C? (Molar heat of vaporization of water = 40.662kJ).
10.Draw a representative plot of conductometrictitration of a strong acid versus
strong base?



ans ALL ques..

Time : 3 hours
Maximum: 100 marks

PARTB-(5x16=80marks)
(i)
(ii)
(iii)
Write any 3 applicationsof IR spectroscopy?
What is the principle involved in flame photometry.
discuss the different
spectrophotometer.
(i)
(ii)
(iii)
11.
(3)
(5)
of
lfV-visible
(
(3)
(5)
components and
working
L2.
(a)
elaborate concentration celis?
discuss the construction and use of calomel electrode.
State Kohlrausch legal regulations of independent migration
any 2 of its applications.
of ions. Expiain
(
Or
(b)
(i)
Calcuiate the half cell potential at 298 K for the reaction,
(aq)+ 2e- -+ Zn (s) if fZn'rl is 5.0 M and E0Zn2*ZL= -0.76 V.
Zn2*
f
.

from

( 3)
( 5)
(
(ii)
(iii)
13.
(a)
(i)
Deducethe Nernst formula for the EMF of a il.
What is polarization? discuss decompositionpotentiai.

.

(ii)
compute the work done when one mole of an ideal gas expands
isothermally and reversibly from a quantity of 10 L to a quantity of
(5)
20 L at 27"C. Gas constant= 8.314 JII{JrnoI.
Derive Van't Hoff isotherm.
Or
(
(iii)
(b)
(i)
with suitable examples.
discuss adiabatic and isothermal processes
(3)
One moie of an ideal gas expands isothermally from 0.1 L t o one . 0 L
aL 27"C. compute the change in free energ'y of the gas? Gas
(ii)

discuss intensive and extensiveproperties with suitable examples.
(3)


constant = 8.314J/WmoL
(iii) Derive Gibbs Helmholtz
thermodynamic properties.
equation
the
(5)
fundamental
(
L 1061

14. (a)
(i)
describe order of a reaction. provide any 2 examples of 2nd order
(3)
reaction.
(5)
Derive the kinetics of opposingreactions which are of 1st order.
(
(ii)
(iii) Discussthe theory of absolutereactionrate'
Or
(b)
(i)
describe half life period. How does it vary with the
concentration ofthe reactant in a reaction ofsecond order?
elaborate parallel
reaction?
reactions? Derive the kinetics
initial
(3)
(ii)
of a parallel
(5)
(iii) The subsequent data were found in the hydrolysis of ethyl acetate
using equal concentration of ester and NaOH :
Time (in min-)
U
quantity of HCI
5
15
25
35




6.13
4.32
3.47
(
r0.24
Show that the reaction is ofsecond order.
15. (a)
(i)
describe the terms adsorbent and adsorbate giving suitable examples.


(3)
(5)
(
(o/
16.00

(iii)
DeduceLangmuir adsorption equation'
Or
(b)
(i)
Mention anY 3 factors which influence adsorption of a gas on a
(3)
solid.
Write an account of adsorption chromatography'
Derive the kinetics of enz;'rne catalysis'
(ii)
(iii)
.
(ii)
elaborate the characteristics of catalysts?

Earning:   Approval pending.