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On introducing a ctatlyst at 500 K, the ...

On introducing a ctatlyst at 500 K, the rate of a first order reaction increases by 1.718 times. The activation energy in the presence of a catalyst is `60.5 kJ "mol"^(-1)`. The slop of the plot of In k `(sec^(-1))` against 1/T in the absence of catalyst is :

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