Question

Which statement about molecularity of reaction is not correct?

• A. It can be obtained from reaction mechanism
• B. It may be either whole number or fractional
• C. It depends on elementary step of reaction
• D. It is the number of molecules of reactants taking part in a single step reaction

Answer 1

The correct option is B It may be either whole number or fractional

Option (B) is incorrect.
Molecularity can never be fractional but it is always in the whole number.
The molecularity of a reaction is defined as the number of molecules or ions that participate in the rate-determining step. The molecularity of the reaction can be 1, 2, 3 etc and according to that, the reaction will be known as unimolecular, bimolecular, trimolecular etc.