The rate of reaction `((dx)/(dt))` varies with nature, physical state and concentration of reactants, temperature, exposure to light and catalyst, whereas rate constant `(K)` varies with temperature and catalyst only. The rate constant `K` is given as `K=Ae^(-E_(a)//RT)` where `A` is Arrhenius parameter or pre-exponential factor and `E_(a)` is energy of activation. The minimum energy required for a reaction is called threshold energy and the additional energy required by reactant molecules to attain threshold energy level is called energy of activation.
The quantity `-E_(a)//RT` in `-Ae^(-E_(a)//RT)` is referred as:

Options

A. (a) Boltzmann factor
B. (b) Frequency factor
C. (c ) Activation factor
D. (d) None of these

Answer

a

Explanation

It is a fact