Higher order (>3) reactions are rare due to :

Engineering

Chemistry

Reaction Mechanism and Molecularity

Question

low probability of simultaneous collision of all the reacting species

shifting of equilibrium towards reactants due to elastic collisions

loss of active species on collision

increase in entropy and activation energy as more molecules are involved.

College PredictorLive

Know your College Admission Chances Based on your Rank/Percentile, Category and Home State.

Get your JEE Main Personalised Report with Top Predicted Colleges in JoSA

Higher order (>3) reactions are less probable due to low probability of simultaneous collision of all the reacting species.