Question

define order of recation ?

Answer 1

 alertness and prudence in a hazardous situation; care; wariness: Landslides ahead—proceed with caution.

Answer 2

The Order of Reaction refers to the power dependence of the rate on the concentration of each reactant. Thus, for a first-order reaction, the rate is dependent on the concentration of a single species. A second-order reaction refers to one whose rate is dependent on the square of the concentration of a single reactant (e.g., in a homo-dimerization reaction, A + A → A2) or the combined first-order dependence on the concentrations of two different reactants (A + B → C). The order of reaction is an experimentally determined parameter and can take on a fractional value. This is distinct from the molecularity (or stoichiometry) of the reaction which is the theoretical integer value of the number of molecules involved in the reaction. For simple one-step reactions, the order and molecularityshould have the same value