Statement: A catalyst always lower the energy of ectivation.
Explanation: The catalyst-reactant interaction forms activated adsorbed complex and adsorption is always exothermic.

Statements : A catalyst lowers the threshokd energy level for reaction . Explanations : Catalyst combines with reactabnt to form an exothermic intermediate and provide another parthway to traction .

A catalyst lowered the energy of activation by 25 kJ mol^(-1) .How many times , the rate reaction increases?

Statements : A catalyst enhances the rate of a reactgion . Expabnations : The energy foactivation of the reaction is lowered in presence of a catarge of the coagualnt ion.

Assertion: The enthalapy of reaction remains constant in the presence of a catalyst. Reason: A catalyst participating in the reaction, forms different activated complex and lowers down the activation energy but the difference in energy of reactants lead to product formation.

Assertion : The enthalpy of reaction remains constant in the presence of a catalyst. Reason : A catalyst participating in the reaction, forms different activated complex and lowers down the activation energy but the difference in energy of reactant and product remains the same.

Statements : A catalyst doesnot alter the equilibrium constant os a reaction . Expabnations : A catalyst complex with the reactants and provides an alternate path wirh a lower energy of activation for the reacton . The forwaord and forwad and reverse reactions are affected to the same extent .

The lowering of activation energy by catalyst is due to :