Energy of activation and temperature coefficient

Problem 12 Discuss the energy of activation and temperature coefficient. (Meerut 2000) 

Or Discuss the effect of temperature on reaction velocity in the light of Arrhenius theory. How the energy of activation of a chemical reaction can be determined experimentally  

Arrhenius (1889) put forward the hypothesis that all the molecules of a reactant do not take part in the chemical reaction. It is only a certain number of molecules known as active molecules that may take part in the reaction. 

The molecules not capable of taking part in the reaction are known as passive molecules. 

On raising the temperature, the equilibrium between active and passive molecules is supposed to shift over rapidly, so that not only we have an increased collision frequency, but still more, we have a largely increased number of active molecules ready to take part in the reaction. The equilibrium is represented as 

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