Species that are formed in one step of reaction mechanism and used up in another step are called
catalysts
intermediates
inhibitors
activated complexes
In any unimolecular reaction ......... . (a) only one reacting species is involved in the rate determining step (b) the order and the molecularity of slowest step are equalto one (c) the molecularity of the reaction is one and order is zero (d) both molecularity and order of the reaction are one