Inversion of sucrose is an example for

The reaction for inversion of sucrose is

${\text{C}}_{\text{12}}{\text{H}}_{\text{22}}{\text{O}}_{\text{11}}+\underset{\text{excess}}{{\text{H}}_{\text{2}}\text{O}}\to \underset{\text{Glucose}}{{\text{C}}_{\text{6}}{\text{H}}_{\text{12}}{\text{O}}_{\text{6}}}+\underset{\text{Fructose}}{{\text{C}}_6{\text{H}}_{12}{\text{O}}_6}$

Number of reacting molecules are 2. Hence, the molecularity is 2.

Here, water is taken in the excess amount then the rate of reaction depends on susucrose only but not on water.

Therefore, the order of reaction is 1(first order). 

This type of reaction is called as pseudo unimolecular or pseudo first order reaction.