Exam Details
| Subject | chemistry | |
| Paper | paper 1 | |
| Exam / Course | indian forest service | |
| Department | ||
| Organization | union public service commission | |
| Position | ||
| Exam Date | 2004 | |
| City, State | central government, |
Question Paper
lil>-100-1 I of 1
PAPER · I
SECTION A
I. A ilSWCJ' nny four questions
l.
Draw the structure of CO2 and SO2, and explain the difference.(10)
write Schrodinger wave equation in three-dimensional fom explaining characteristics of
wave function.
(c)explain the paramagnetic behaviour of O2 molecule in terms of MO theory. Also explain why
VB theory fails to explain it.
(d)Write iikovic equation explaining all the terms and show that diffusion current is directly
proportional to concentration.
Explain Frenkel and Schottky defects in a crystal with a suitable example.
2.(a)Draw the molecular orbital diagram of NO molecule, and show that NO+2,CN-and CO are
isoelectronic.(20)
(b)What do you understand by the term orthogonally of wave function Draw the nature of 5d
orbital.(20)
3.(a)What are the seven crystal systems and 14 Bravais lattices? Explain their characteristics with
a suitable example for each.(20)
(b)Derive an expression for enthalpy change in 3 chemical reaction. Calculate deltaH deg at 120 degC for
the reaction.
<img src='./qimages/1472-3b.jpg'>
given that deltaH deg 298 -8.4 kcal and the molar heat
capacities are: Fe2O3(s) 25.0:
6.1;H2O (1)18.0 and 6.9 cal deg-1 mol
4.(a)What is phase rule? explain all the terms used therein. Further explain how water exists in
three phases in equilibrium with the help of a phase diagram.(20)
(b)Explain the working of Galvanic cell. Show that a cell with +ve e.m.f will perform work.
whereas that with -ve e.m.f will consume work.
SECTION 8
5.Answer any four of the following:
Explain the difference between Freundlich and Langmuir isotherms. Discuss their limitations.(10)
(b)What are cytochromes explain their importance in biochemical processes.
(c)Explain photochemical reaction with a suitable example. How is quantum yield calculated?
(d)What is lanthanide contraction and its consequences?(10)
(e)Explain the difference between bridged and terminal CO groups in di and tricarbonyls with
suitable example.
6.(a)in what respects various types of isomerisms in coordination compounds are different than in
organic compounds? Explain following
types of isomerisms with two examples of each type:
(i)Ionization isomerism.
(ii)Optical isomerism.
(iii)Coordination isomerism
(b)What is ferrocene? Discuss bonding and structural characteristics of metal cyclopentadienyl
complexes with two examples in what respects these are different from metal alkynes
complexes?(20)
7.Write brief notes on the following
Chelate effect.
Nitrogen fixation.
Determination of surface area.
Fluxional molecules.
8.(a)Describe an experimental method for the determination of lattice energy of an ionic solid
using Born-Haber cycle.(20)
(b)Explain the role of liquid ammonia as a non-aqueous solvent with emphasis on redox and
complex formation reactions.(20)
PAPER · I
SECTION A
I. A ilSWCJ' nny four questions
l.
Draw the structure of CO2 and SO2, and explain the difference.(10)
write Schrodinger wave equation in three-dimensional fom explaining characteristics of
wave function.
(c)explain the paramagnetic behaviour of O2 molecule in terms of MO theory. Also explain why
VB theory fails to explain it.
(d)Write iikovic equation explaining all the terms and show that diffusion current is directly
proportional to concentration.
Explain Frenkel and Schottky defects in a crystal with a suitable example.
2.(a)Draw the molecular orbital diagram of NO molecule, and show that NO+2,CN-and CO are
isoelectronic.(20)
(b)What do you understand by the term orthogonally of wave function Draw the nature of 5d
orbital.(20)
3.(a)What are the seven crystal systems and 14 Bravais lattices? Explain their characteristics with
a suitable example for each.(20)
(b)Derive an expression for enthalpy change in 3 chemical reaction. Calculate deltaH deg at 120 degC for
the reaction.
<img src='./qimages/1472-3b.jpg'>
given that deltaH deg 298 -8.4 kcal and the molar heat
capacities are: Fe2O3(s) 25.0:
6.1;H2O (1)18.0 and 6.9 cal deg-1 mol
4.(a)What is phase rule? explain all the terms used therein. Further explain how water exists in
three phases in equilibrium with the help of a phase diagram.(20)
(b)Explain the working of Galvanic cell. Show that a cell with +ve e.m.f will perform work.
whereas that with -ve e.m.f will consume work.
SECTION 8
5.Answer any four of the following:
Explain the difference between Freundlich and Langmuir isotherms. Discuss their limitations.(10)
(b)What are cytochromes explain their importance in biochemical processes.
(c)Explain photochemical reaction with a suitable example. How is quantum yield calculated?
(d)What is lanthanide contraction and its consequences?(10)
(e)Explain the difference between bridged and terminal CO groups in di and tricarbonyls with
suitable example.
6.(a)in what respects various types of isomerisms in coordination compounds are different than in
organic compounds? Explain following
types of isomerisms with two examples of each type:
(i)Ionization isomerism.
(ii)Optical isomerism.
(iii)Coordination isomerism
(b)What is ferrocene? Discuss bonding and structural characteristics of metal cyclopentadienyl
complexes with two examples in what respects these are different from metal alkynes
complexes?(20)
7.Write brief notes on the following
Chelate effect.
Nitrogen fixation.
Determination of surface area.
Fluxional molecules.
8.(a)Describe an experimental method for the determination of lattice energy of an ionic solid
using Born-Haber cycle.(20)
(b)Explain the role of liquid ammonia as a non-aqueous solvent with emphasis on redox and
complex formation reactions.(20)