The bond angles in CH4, NH3 and H20 molecules are l09·5°, l07° and l04·5° respectively. Explain.
Comment on the dipole moments of BF3 and PF3 molecules.

What is residual entropy? Why certain substances like CO and N20 are associated with residual entropy even at 0K

Derive the relation n*lambda 2d sinQ in crystallography.
What is the perpendicular distance between planes of a cubic unit cell?

Explain "continuity of state" with the help of isotherms of CO2, How is it affirmed by van der Waals' equation?

The solubility product of BaSo4 is 1 x10-10 md2dm-6. If the ionic conductance at infinite dilution at 25°C of Ba+2 127·28 x 10-4 m2 mho mol-1 and SO4-2 160·0 x 10-4 m2 mho mol-1, calculate the specific conductance of BaSO4•


Draw the molecular orbital diagram of NO molecule. Show that CN- and CO are isoelectronic, and the bond order of NO is lower than that of NO+
Discuss the theory of absolute reaction rate. How does catalyst reaction rate faster?

Starting with the expression dP/dT=Delta for the system consisting of two phases of a single substance in chemical equilibrium. Derive the integrated form of the Clausius-Clapeyron equation.

The heat of reaction 2NH3 at 27°C was found to be -21·97 Kcal. What will be the heat of reaction at 50°C? The molar heat capacities at constant pressure and at 27°C for N2, H2 and NH3 are 6·8, 6·77 and 8·86 cal mol-1 deg-1


Explain the adsorption theory of catalysis. Give one example and indicate the type of adsorption involved. What effect does a catalyst have on an equilibrium system? .
What are semiconductors Explain n-type and p-type semiconductors.Discuss the effect of temperature on semiconductors.

Define "Partial molal property". What is its physical significance?

What are the angular wave functions of d-orbitals Explain them, including their geometric signs, with the help of neat and labelled diagrams.


State and explain Einstein law of photochemical equivalence. What is quantum yield? Explain the causes of low quantum yield.
Discuss the principle of polarographic analysis. Explain the meaning and significance of half wave potential.

Set up the Schrodinger's wave equation in 3-dimension. Comment on the nature of the equation. and various terms involved. Explain the significance of SYE and SYE2

Find out the equilibrium constant for the reaction

K1
A+B C
K-1
assuming the relaxation time 2·0 micro sec and 3·0 micro Sec for

1·0 M and
0·5 M respectively.

5.
Explain the pattern of splitting of d-orbitals in a square-planar ligand field. Label each energy level properly.
Calculate the crystal-field-stabilization energy and spin-only magnetic moment of [Co(NH3)6]Cl2.

Draw labelled structures of all the possible isomers of dichloro bis (ethylene­diamine) cobalt ion. Does a meso form exist? Give reason to support your answer.

Write the structure of Fe2(CO)9 Show that each Fe atom conform to the 18 electron rule.

What do you understand by an "oxidative addition" reaction? How does it differ from an
"insertion-reaction"? Give one example in each case.

In general, the principal oxidation state of lanthanide elements is but some elements also exhibit other oxidation states. Explain.


What are the main reasons for the formation of interhalogen compounds? Give one example of each type. Give the method of formation of IF? and draw its structure. .
What are "labile" complexes? Outline the relationship between lability and electronic structure of a complex. Name the type of method used in the study of such complexes.

Explain crystal-field stabilization-energy. What are the factors that affect its magnitude?

Write IUPAC nomenclature of the following:
K3[Fe(CN)5 NO]



What are metal carbonyls? How Ni(CO)4 is obtained by Mond's process? Show that the molecule has a tetrahedral structure.
What do you understand by "Lanthanide contraction" How does it affect the chemistry of 4d and 5d block elements.

Describe the important structural features of "Ferredoxin molecule". What is its role in photosynthesis?

Starting with prepare diammine dichloro platinum Name the isomer formed. Choose the relevant starting material and write all the steps to get the other geometrical isomer of the above product.


What are low-spin and high-spin complexes? Indicate spin states of CoF6 and Co(NH3)6 complexes. Explain their magnetic character.
What is peroxomonosulphuric acid? Give its method of preparation, properties and structure.

What are "Fluxional" molecules? How does nmr spectroscopy help the detection of fluxional character?

Volume of nitrogen gas at 1 atm and 273 K required to cover 1 g of silica gel is 0·129 dm3. Calculate the surface area of the gel if each nitrogen molecule occupies an area of 16·2x1O-1O m2 .