Time allowed: three
Hours maximum marks: 200
Candidates should attempt question 1 and 5 which are compulsory,
and any Three of the following questions selecting at least one question from
each section.
SECTION – A
1.
Answer any FOUR of the following:-
(a)
What are the four quantum numbers? Show that
these are not same for Cu atom,
(b)
Explain the terms order and molecularity of a
reaction by considering the reaction of eater hydrolysis.
(c)
Draw the shapes of s, p, and d orbital’s, show
their directional characteristics
(d)
Explain why H₂O exists as solid ice, liquid as
well as gas whereas H₂ S exists as gas only.
(e)
What are the crystal types of NaCI and CsCI and explain
the difference.
2.
(a) derive an expression for the energy of particle in a box ( one dimensional only)
(b) Draw molecular orbital
diagram of CO and its valence bond picture explaining its bond order and back bonding
character.
3.
(a) Explain the difference between a conductor,
semiconductor and insulator on the basis of band theory. How additions of an
impurity affects the behavior of a pure metal/ crystal?
(b) Derive expressions for work done against:
(i)
Constant external pressure and
(ii)
Isothermal reversible expansion of n ideal gas showing
that the work done depends on initial and final states only.
4.
(a) In want respects phase diagram of binary
system differs from one component system considering a suitable example?
(b) What is electrochemical series? Explain how it helps to determine
reducing and oxidizing properties of specie. Calculate e.m.f. of an electrochemical
cell
Mg(s)
+ Cu ²⁺ (aq) → Mg² (aq) + Cu(S)
Given that half cell potentials of
Mg² (aq) + 2e → Mg(s) and
Cu² (aq) + 2e → Cu (s)
Are – 2.360 and 0.337 V respectively.
SECTION
– B
5.
Answer any FOUR of the following:
(a)
What is the difference between adsorption and
absorption? Explain with a suitable example foe each.
(b)
Explain photosynthesis and show with the help of
a suitable experiment that CO₂, H₂O and sunlight are essential.
(c)
Show that ammonia behaves as solvent with
suitable examples for neutralization and complex formation reactions.
(d)
In what respect lanthanides are different than
actimides especially with regard to their occurrence, and oxidation states?
(e)
Discuss the structure of Ni (CO)₄
6.
(a) What are
the various postulates of crystal field theory? Draw the crystal field splitting
of 3d orbitsals in presence of six ligands to form octahedral geometry. Calculate
crystal field stabilization energy and magnetic moments for d⁴ and d⁵
configurations in presence of H₂O and CN- as ligands.
(b) Write brief notes on the following with
suitable example data: - (i) Chain reactions (ii) Lanthanide contraction.
7.
(a) What are the various types of metal
carbonyls? Explain the bonding characteristics of metal carbonyls. Give an
example each for mono, di- and tricarbonyls and draw their structures.
(b) What do you
understand by thermodynamic and kinetic stability of complexes? Explain the
terms ‘inert’ and ‘labile’ with a suitable example for each.
8.
(a) explain the following terms briefly with
suitable example:-
(i)
Super acids
(ii)
Metal atom clusters.
(b) What
is first order reaction? Derive an expression for half life of first order reaction.
Draw the nature of plot between logs [N₂ O₄] against time in the first order
decomposition of N₂O₄.
No comments:
Post a Comment