Mark the incorrect statements.
(i) Catalyst provides an alternative pathway to a reaction mechanism.
(ii) Catalyst raises the activation energy.
(iii) A catalyst lowers the activation energy.
(iv) Catalyst alters enthalpy change of the reaction.
The answer is the option (ii, iv)
(i) On adding the catalyst to a reaction, medium rate of reaction increases with decreasing activation energy of molecule.
(ii) The enthalpy change of reaction remains unchanged due to a catalyst. In both the catalysed and uncatalysed reaction, energy of reactants and products are alike.