Anna University Chennai 2006 B.E CY 1101 - CHEMISTRY - I - Question Paper

L 1061
B. E./B. Tech. DEGREE EXAMINATION, MAYiJUNE 2006.
First Semester

Civil Engineering
CY 1101 - CHEMISTRY - I


(Common to all branches other than Marine Engineering)
(Regulation 2004)
Time : 3 hours Maximum: 100 marks

ans ALL ques..
PARTA-(10 x2=20 marks)

1. describe EMF of an electrochemical cell.
2. Draw a representative plot of conductometric titration of a strong acid versus
strong base?
3. 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).
4. What is Helmholtz work function, A?
5. Write the nuclear reaction of decay of Polonium?
6. Write the relationship which indicates the influence of temperature on reaction
rate.
7. What is Freundlich adsorption isotherm?
8. State Beer Lamberts iaw.
9. elaborate the different kinds of electronic transitions?
10. Mention any 2 advantages of instrumental methods of anaiysis.


PARTB-(5x16=80marks)


11. (i) Write any 3 applications of IR spectroscopy? (3)
(ii) What is the principle involved in flame photometry. (5)
(iii) discuss the different components and working of lfV-visible
spectrophotometer. (8)
L2. (a) (i) elaborate concentration celis? (3)
(ii) discuss the construction and use of calomel electrode. (5)
(iii) State Kohlrausch legal regulations of independent migration of ions. Expiain
any 2 of its applications. (8)
Or
(b) (i) Calcuiate the half cell potential at 298 K for the reaction,
Zn2*( aq)+ 2e-- + Zn (s) if fZn'rl is 5.0M and E0Zn2f* Z L= -0.76V .
(ii) Deduce the Nernst formula for the EMF of a ceil.
(iii) What is polarization? discuss decomposition potentiai.
13. (a) (i) discuss intensive and extensive properties with suitable examples.
(3)
(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
20 L at 27"C. Gas constant = 8.314 JII{JrnoI. (5)
(iii) Derive Van't Hoff isotherm. (8)
Or
discuss adiabatic and isothermal processesw ith suitable examples.
constant = 8.314 J/WmoL
Derive Gibbs Helmholtz formula from
thermodynamic properties.
(3)
Lto1.0L
gas? Gas
(5)
the fundamental
b) (i)
(ii) 1 moie of an ideal gas expands isothermally from 0.1
aL 27"C. compute the change in free energ'y of the
(iii)
14. (a) (i) describe order of a reaction. provide any 2 examples of 2nd order
reaction. (3)
(ii) Derive the kinetics of opposing reactions which are of 1st order. (5)
(iii) explain the theory of absolute reaction rate' (8)
Or
describe half life period. How does it vary with the initial
concentration ofthe reactant in a reaction ofsecond order? (3)
elaborate parallel reactions? Derive the kinetics of a parallel
reaction? (5)
The subsequent data were found in the hydrolysis of ethyl acetate
using equal concentration of ester and NaOH :
Time (in min-) quantity of HCI
16.00
r0.24
6.13
4.32
3.47
Show that the reaction is ofsecond order.
15. (a) (i) describe the terms adsorbent and adsorbate giving suitable examples.
Or
(b) (i) Mention anY 3 factors
solid.
which influence adsorption of a gas on a(8)
(ii) elaborate the characteristics of catalysts?
(iii) Deduce Langmuir adsorption equation'
(ii) Write an account of adsorption chromatography'
(iii) Derive the kinetics of enz;'rne catalysis'

Earning:   Approval pending.