A catalyst decreases `E_(a)` form `100 KJ mol^(-1)` to `80 KJ mol^(-1)` At what temperature the rate of reaction in the absence of catalyst at `500 K` will be equal to rate reaction in the presence of catalyst?

If the change in enthalpy of a reaction in absence of a catalyst is "xkJ.mol"^(-1) what will be the change in enthalpy of the reaction in the presence of a catalyst?

A catalyst decreases activation energy by 15 Kcal and it is observed that rate of reaction in absence of catalyst at 400K is same as rate of reaction in presence of catalyst at 300 K. The activation energy in absence of catalyst will be :

A catalyst lower the activation energy of a reaction from 200KJ "mol"^(-1) to 100 KJ "mol"^(-1) . The temperature at which the rate of uncatalysed reaction will be same as the rate of catalysed reaction at 25^(@)C is (assuming Arrheneous consant A to be same in both the case)

A catalyst lowers the activation energy of a reaction from 20 kJ mol^(-1) to 10 kJ mol^(-1). The temperature at which uncatalysed reaction will have same rate as that of catalysed at 27°C is

Assertion: A catalyst increases the rate of a reaction. Reason: In presence of a catalyst, the activation energy of the reaction decreases.