Define molarity and molality.
[3 marks]Explain the importance of nan-composites.
[4 marks]Differentiate between S 1 and S 2 reactions. Give one example of N N each.
[7 marks]Identify ortho-, para-directing groups; -CN, -NH , -OH, -NO , -COOH, -CH .223
[3 marks]Explain Beer-Lambert law.
[4 marks]Draw the phase diagram of Zinc-Cadmium system. Describe its importance.
[7 marks]Derive the expression for a first order reaction.
Differentiate between nematic phase and smectic phase.
[3 marks]Suggest a method for resolution of racemic mixture.
[4 marks]Explain the optical isomerism in lactic and tartaric acid.
[7 marks]Differentiate between refractories and insulators.
[3 marks]Suggest a suitable bonding theory to explain paramagnetic behavior of O .2
[4 marks]Explain the shape of NH and SF on the basis of hybridization and34 VSEPR theory.
[7 marks]State basic principle of mass spectroscopy.
[3 marks]State Hess’s Law of constant heat summation, its importance in thermo- chemistry.
[4 marks]SEM is powerful tool to study the surface of a material. Explain its principle, instrumentation and applications.
[7 marks]Calculate the mole fraction of methanol, if its 16 g is dissolved in 36 g water.
[3 marks]Enthalpy of combustion of carbon to carbon dioxide is –393.5 J/mol. Calculate the heat released upon formation of 22 g of CO from carbon2 and oxygen gas.
[4 marks]Derive Bragg’s equation; nλ = 2d sin θ.
[7 marks]Denote Eand Zisomers in but-2ene.
[3 marks]Explain generation, stability and fate of a carbocation.
[4 marks]Give reason: (a) High order reactions are uncommon. (b) Zeolites act as shape selective catalysts.
[7 marks]What is glass transition temperature?
[3 marks]Explain generation of a benzyne in elimination-addition mechanism of S Ar reactions. N
[4 marks]Derive Schrödinger wave equation and explain the importance of ψ.1
[7 marks]