" 2) Define molecularity of a reaction."

(a) (i) From the following data, show that the decomposition of hydrogen peroxide is a reaction of the first order : |{:("t (min)",0,10,20),("V (ml)",46.1,29.1,19.3):}| Where t is the time in minutes and V is the volume of standard KMnO_(4) solution required for titrating the same volume of the reaction mixture. (ii) Define molecularity of a reaction.

Explain molecularity of a reaction.

The molecularity of a reaction is :

Molecularity of the reaction :

Define molecularity of a reaction, Illustrate with an example.