Why did we need the modification in the Debye-Huckel theory?

What is the role of solvent in the Debye-Huckel model of a solution of an electrolyte?

Describethe lock and key hypothesis of the enzyme action.

Explain the difference between homogeneous and heterogeneous catalysis with suitable examples.

Give the principle of ultrasonic relaxation methods for the determination of the rates of the fast reactions.

What are two important features of the expression for rate of activation as per RRK theory?

Discuss the Lindemann-Christiansen mechanism for unimolecular reactions and give the Hinshelwood's modification of this mechanism.

Give the salient features ofthe collision theory and calculate the factor that relates the collision theory with Arrhenius Equation.

Identify all the symmetry elements in trans C₂H₂Cl₂or B₂Cl₆

Give the difference between screw Axis and glide Plane by using suitable illustrations.

Show the following planes in cubic unit cells

i) (110) in Primitive cubic cell

ii) (111) in Face-centred cubic cell and

iii) (200) in Body-centred cubic cell.

State the law of constancy of interfacial angles .

If atoms of element B form HCP lattice and 2/3rd of tetrahedral voids are occupied by those of the element A, what is the formula of the compound formed by the elements A and B?

Define Tetrahedral and Octahedral voids in three dimensional close packing.

Derive an expression for the rotational partition function.

A system consist of two energy level 60 and 61 which are singly and triple degenerate, respectively. Calculate the partition function of the system.

A system consist of two energy level 60 and 61 which are singly and triple degenerate, respectively. Calculate the partition function of the system.

Give Stirling's approximation and outline its significance. Calculate the % error introduced in computing the value of 10! by using this approximation. (Given In 2=0.69 and In 3= 1.01)

Define partial molar volume and give its physical significance.

Two moles of an ideal gas expand isothermally at 300 K from 7 bar to 3 bar. Calculate the change in the Helmholtz energy and Gibbs energy for the process.