Time Allowed: Three Hours Maximum marks: 200
Candidates should attempt Questions 1 and 5 which are compulsory and any
THREE of the remaining questions selecting at least ONE question from each
Section. Assume suitable data. If considered necessary, and indicate the same
clearly.
SECTION B
SECTION B
5.
Answer any four of the following:
(a)
Give an
account of the red-ox and precipitation reactions in liquid ammonia.
(b)
What is chelate effect?
(c)
What are fluxional molecules? Give two examples.
How are they characterized?
(d)
Explain the variation of magnetic moments within
the lanthanides.
(e)
Identify the various physical pathways by which
a phone excited molecule undergoes deactivation.
6.
(a)
Discuss the structural aspects of metal-olefin and metal- alkyne
complexes giving experimental evidences, and metal- alkyne complexes giving
experimental evidences.
(b) Discuss the salient features of molecular orbital theory and discuss
its use in explain in the bonding in N₂ , O₂ and HF molecules.
7.
(a) What are metal atom clusters? Discuss the
structure and bonding of two metal clusters with M-M single bond and M- M
multiple bonds.
(b) Assign the observed electronic absorption bands of [Ni (H₂ₒ) ₆] ²+
and [Cr (OX) ₃]³ - and explain on the basis of crystal field theory.
8.
(a) Discuss in detail the mechanism of oxygen
transport in biological systems.
(b) Give an account of the linkage isomerism and the various factors
stabilizing the isomers. Choose suitable examples.
