What is activation energy? How is related to rate constant of a reaction?

Define activation energy of a reaction.

What is the effect of temperature on the rate constant of a reaction? How can this effect of temperature on rate constant be represented quantitatively?

The activation energy of reaction is equal to

True or False : Higher the activation energy of a reaction, faster is the reaction.

Unit of rate constant for zero order reaction is

The rate of reaction is equal to rate constant of the reaction. What is the order of reaction?

What is the unit of rate constant for second order reaction ?

Arrhenius studies the effect of temperature on the rate of a reaction and postulted that rate constant varies with temperature exponentially as k=Ae^(E_(a)//RT) . Thuis method is generally used for finding the activation energy of a reaction. Keeping temperature constant, the effect of catalyst on the activation energy has also been studied. If the rate of reaction doubles for 10^(@)C rise of temperature form 290K to 300K, the activation energy of the reaction will be approximately: a) 40 Kcal mol^(-1) b) 12 Kcal mol^(-1) c) 60 Kcal mol^(-1) d) 70 Kcal mol^(-1)