Annamalai University 2007 B.Sc Chemistry INORGANIC - Question Paper

Maximum : 100 Marks
ans ALL the ques..
All ques. carry equal marks.
UNIT - I
1. (a) What is the difference ranging from mineral
and ore ? With composition, write any
two every of oxide and carbonate ores.
(b) What is corrosion ? provide an account of
pitting corrosion. (6)
(c) elaborate refractories ? How are they
classified ? discuss any 5 properties of
refractories. (10)
(OR)
10. (a) elaborate alloy steels ? Enumerate the
advantages of stainless steel. (4)
(b) elaborate the raw materials used for
making ceramics ? discuss the subsequent
manufacturing processes of ceramics :
(i) Slit casting.
and (ii) Glazing. (6)
(c) explain the mechanism of
(i) Dry corrosion.
and (ii) Wet corrosion. (5 + 5)
(b) discuss the processes of :
(i) Zone refining.
and (ii) Electrolytic refining. (3 + 3)
(c) What is steel ? discuss the
(i) Bessemer process.
and (ii) Open hearth process
of manufacturing steel.
(2 + four + 4)
(OR)
2. (a) discuss the subsequent terms as applied to
metallurgy :
(i) Gangue.
(ii) Slag.
(iii) Flux.
(iv) Smelt. (4)
(b) provide an account of
(i) Froth floatation.
and (ii) Van Arkel process. (3 + 3)
8. (a) Write about ionisation isomerism and
linkage isomerism in co-ordination
compounds. (2 + 2)
(b) define the preparation and structure
of ferrocene. (6)
(c) (i) discuss the formation of
[Ni (NH3)6]2+ based on the molecular
orbital theory. (5)
(ii) What is crystal field stabilization
energy ? compute the CFSE values
for low and high spin complexes of
d4, d5 and d6 ions. (5)
UNIT - II
3. (a) discuss the terms :
(i) Mass defect.
and (ii) Packing fraction. (2 + 2)
(b) How radioisotopes are used in
(i) Medicine
and (ii) Agriculture ? (3 + 3)
(c) (i) With principle, discuss the working
of synchrotron.
(ii) Write notes on group displacement
law. (6 + 4)
(OR)
4. (a) discuss the subsequent :
(i) N/P ratio.
(ii) Uranium as a source of energy.
(2 + 2)
(b) (i) Write an account on hydrogen bomb.
(ii) The amount of C - 14 isotope in
a piece of wood is obtained to be
one - 6th current in a fresh
piece of wood. compute the
age of the wood. Half - life period
of C - 14 = 5577 years. (3 + 3)
(c) (i) How is radioactivity measured using
Wilson - cloud chamber ?
(ii) Write notes on Stellar energy.
(6 + 4)
UNIT - III
5. (a) With examples, discuss the Lux - Flood
concept of acids and bases. (4)
(b) explain the steric effects on the strength
of acids and bases. (6)
(c) With 2 examples each, define the
subsequent reactions of liquid ammonia
solvent :
(i) Acid - base neutralisation
reaction.
(ii) Precipitation reaction.
(iii) Amphoteric reaction.
(iv) Solvolysis reaction.
and (v) Solvation reaction. (5 × two = 10)
(OR)
6. (a) discuss the Lewis concept of acids and
bases. (4)
(b) Differentiate the terms :
(i) Levelling solvent.
and (ii) Differentiating solvent. (3 + 3)
(c) discuss the subsequent :
(i) Ammonia is a protonic solvent.
(ii) Alkali metals dissolve in
ammonia to provide blue to bronze
coloured solution.
UNIT - IV
7. (a) Write the IUPAC names of the
subsequent :
(i) [ Co (en)2 Cl2 ] NO3.
(ii) [Cr (H2O)2 (NH3)2 Br (ONO)] Cl.
(iii) [ Pt (NH3) Br Cl(NO2) ].
(iv) (NH4)4 [Fe CN)6 ]. (4)
(b) provide the valence bond interpretation for
the observed magnetic moment of the
subsequent complexes :
[Fe(CN)6]3. = 1•86 BM ;
[FeF6]3. = 5•89 BM ;
[Ni (CN)4]2. = diamagnetic.
(3 × two = 6)
(c) (i) define any 1 method of
determination of stability constant.
(ii) Write notes on ligand field theory.
(5 + 5)
(OR)
(c) Name any 2 ores of silver with their
compositions. How is silver extracted by
cyanide process ? discuss the process of
desilverization of lead. (2 + five + 3)
(iii) Water can act both as an acid
and a base.
(iv) F . is a stronger base than I ..
(4 × 2½ = 10)
:UNIT - V
9. (a) provide the composition and uses of the
subsequent alloys :
(i) Duralumin.
(ii) Brass.
(iii) Monel metal.
(iv) Solder. (4)

Earning:   Approval pending.