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InterviewSolution
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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. At what conditions exponential factor is zero a reaction?A. (a) Inifinite remperatureB. (b) Free radical combinationC. (c ) Energy of activation = Threshold enerhyD. (d) All of these |
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Answer» Correct Answer - d `K=Ae^(-E_(a)//RT)` If `Trarr oo` then `K=A` Also `E_(a)=0` for free radical combination. |
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