Give the different ways by which lead affects the human body. 

Give a short account of the essential and non essential elements occurring in biological systems.

What information is obtained from the IR spectrum of Fe₂(CO)₉? 

The IR spectrum of Fe₂(CO)₉

With suitable diagrams explain the polarity of the free CO molecule as well as when it binds with a transition metal cation. 

With suitable reactions (any two) explain how carbonyl hydrides are formed by reaction of metal carbonyls with hydrogen. 

Explain the structure of Fe(CO)₅ based on valence bond approach. 

With the help of suitable equations, give any two methods for preparation of metal carbonyls by reductive carbonylation. 

Give the structure of methyl lethium. 

Give the IUPAC nomenclature of potassium dichromate. Also give its reaction with potassium iodide in acidic medium. 

Compare the collision theory with Arrhenius theory.

If the half-life of a first order reaction in A is 15 min, how long will it take for [A] to reach 10 percent of the initial concentration? 

What is meant by rate of a reaction? List and explain different types of rates used in chemical kinetics. 

Derive the integrated rate equation for a second order reaction in which a single reactant forms the product and the reaction rate depends on the second power of the reactant concentration.

List different factors affecting the rates of chemical reactions. 

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.