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The order of a chemical reaction can be ...

The order of a chemical reaction can be zero and even a fraction but molecularity cannot be zero or a non-integer. What do you mean by the order of a reaction ?

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It is sum of powers of the concentration terms in the expression.
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Assertion: Order of a reaction can be fractional but molecularity is never fractional. Reason: Order of reaction may not depend upon the stoichiometric coefficients ofthe balanced equation.

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