The density and cell-edge length of sodium chloride are 2.163 X 10³ kg m^-3 and 5.63 X l0^-10 m, respectively. Using these data, arrive at the number of formula units per unit cell of sodium chloride crystal.

Explain the Bravais Lattices in orthorhombic crystals. Give suitable diagrams. 

With suitable diagrams, explain the axes of symmetry in a cubic system. 

Explain the London or dispersion forces. Compare it with dipole-dipole forces. 

Define critical constants and give their expressions in terms of van der Waals constants. 

State the Dalton’s law of partial pressure and give its significance. 

State the assumptions of kinetic theory of gases and derive the following expression for the pressure of a gas.

Calculate the spin-only magnetic moment for low-spin octahedral complex of d 5 and d 6 ions.

What is meant by tetragonal distortion in octahedral geometry? 

Compare the CFSE of an octahedral complex with that of a tetrahedral complex for four electrons in the d orbitals. 

Explain ligand isomerism with suitable example. 

According to valence bond theory, how do you account for the indicated molecular geometry for the following compounds:

(i) [Fe(CN)6] 3- - Octahedral and (ii) [GaCl4] - - Tetrahedral 

Give the rules of IUPAC nomenclature for naming complexes (give any five points). 

What is meant by coordination entity and coordination sphere? 

Give the most common oxidation states of the lanthanoids. Give their configurations.

In [Ni(H2O)6] 2+ the observed magnetic moment is higher than the spin-only value. Explain the reason. 

What is the general electronic configuration of elements of the second transition series? Which d orbitals are filled up here? 

Write the products formed in each of the following and give the mechanism.

Arrange the following radicals in their increase order of stability and give the reason of your answer.

Predict the product and write the mechanism.