The rate constant of a first order reaction increases from to 4 when the temperature changes from 300 K to 310 K. Calculate the energy of activation ().

Calculate the freezing point of the solution when 31 g of ethylene glycol ( is dissolved in 500 g of water. ( for water is 1.86 K kg/mol)

Define the following terms:

a) Primitive unit cells

b) Schottky defect

c) Ferromagnetism

Define the following terms:

a) Brownian movement

b) Peptization

c) Multimolecular colloids

i) What is the principle behind the zone refining of metals?

ii) What is the role of Silica in the extraction of Copper?

iii) How is ‘cast ion’ different from ‘pig iron’?