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 .

Assertion : A catalyst lowers the threshold energy level for a reaction Reason : A catalyst combines with one of the reactans of from an intermediate the follows an alternate path with lesser energy of activation.

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 .

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

Statements : In catalysis , the eneire reaction occurs in a single phase Explanations : Catalystic ation of a surface depends on its abosrupoint of the reactants .

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.

Statements : The activity of catalyst is more or less specific. Explanations : A catalyst for one reaction is not necessary to catlyse the other reaction .

Which is not the correct statement for a catalyst? (A) It does not alter activation energy for backward reaction B) The surface of heterogenous catalyst adsorbs reactants c) Catalyst may form intermediates with reactants D) Action of enzyme catalyst is specific

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