The decomposition reaction `N_(2)O to N_(2) + O_(2)` takes place on platinum surface. Here, the rate of reaction is independent of the concentrations of the reactant . However, when this reaction is carried out in the absence of platinum surface, the rate of reaction depends on the concentration of the reactant How do you account for this ?

Explanation

(i) role of plantinum in the reaction
(ii) property of platinum
(iii) site of decomposition
(iv) comparison of mechanism of reaction in the presence and absence of a catalyst