Assertion: Order and molecularity are always same.
Reason: Order is determined experimentally and molecularity is the sum of the stoichiometric coefficient of rate determining elementary step.
Answer & explanation
Correct answer: option 4
Order and molecularity are not always same. They may be the same for bimolecular or trimolecular reactions.
Order is determined experimentally and molecularity is the sum of the stoichiometric coefficient of rate determining elementary step.