(1)

Successive half lives of zero order reactions decreases with time Note: successive half lives of first order reactions remains same

For zero order reactions, the rate of reaction is independent on the concentration of reactants.

In some reaction molecularity (theoretical value) may be equal to the order of a reaction (experimental value). The order of a reaction may be fractional, zero, positive or negative. Molecularity can never be fractional.

Unit of k =

Zero order = mollit -1 sec -1

Second order = mol -1 lit -1