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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:A. (a) Boltzmann factorB. (b) Frequency factorC. (c ) Activation factorD. (d) None of these |
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Answer» Correct Answer - a It is a fact |
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