Which of the following statement is not correct about order of a reaction ?

Options

A. The order of a reaction can be a fractional number
B. Order of a reaction is experimentally determined quantity
C. The order of a reaction is always equal to the sum of the stoichiometric coefficients of reactants in the balanced chemical equation for a reaction
D. The order of a reaction is the sum of the powers of molar concentration of the reactants in the rate law expression

Answer

C

Explanation

Order of reaction is equal to the sum of powers of concentration of the reactants in rate law expression .
For any chemical reaction
`xA+yB to "Product"`
`"Rate"=k[A]^(x)[B]^(y)`
Order = `x+y`
Order of reaction can be a fraction also . Order of reaction is not always equal to sum of the stoichiometric coefficients of reactants in the balanced chemical equation . For a reaction it may or may not be equal to sum of stoichiometric coefficient of reactants .