Assertion : The overall order of the reaction is the sum of the exponents of all the reactants in the rate…
Assertion : The overall order of the reaction is the sum of the exponents of all the reactants in the rate expression.
Reason : There are many higher order reactions.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false.
Solution
Reactions of higher order are rare because chances for larger number of molecules to come simultaneously for collision are less.