JEE Chemistry
JEEChemistryChemical KineticsClass 12

What is the difference between order and molecularity?

Order is experimental and can be zero or fractional; molecularity is the count of species in an elementary step and is always a whole number.

Order is experimental and can be zero or fractional; molecularity is the count of species in an elementary step and is always a whole number. A reliable way to keep them apart is to focus on what each one is defined by, not just the similar-sounding words.

Key point

order vs molecularity

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