Define 'Order' and 'Molecularity' of a reaction.

Write the difference between Order and Molecularity of a reaction.

Define molecularity of a reaction, Illustrate with an example.

Explain the terms with suitable exapmples. Molecularity of a reaction

(A) Order of recation is related to molecularity of reaction (R ) Molecularity of recation can be fractional.

Define and explain the order of a reaction. How is it obtained exprimentally ?

(A) Molecularity has no meaning for a complex reaction. (R ) The overall molecularity of a complex reaction is equal to the molecularity of the slow step.

Define the terms : Molecular mass.

Define half - life of a reaction.

(A) Order and molecularity are always equal (R ) Complex reactions take place in steps and the fastest step determines rate of reaction.