Note: In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion : Order and molecularity are same.
Reason : Order is determined experimentally and molecularity is the sum of the stoichiometric coefficient of rate determining elementary step.
Order of a reaction is an experimental quantity and it is the sum of the powers of the molar concentration of reactants in a rate law expression.
Whereas molecularity of a reaction is the number of reacting species that must collide in order to bring about a chemical reaction. For reaction taking place in steps molecularity is determined by the sum of stoichiometric coefficient the slowest step (which is the rate-determining step).
Thus, molecularity and order are different.
So, the assertion is wrong and the reason is correct.