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Q.

Which of the following statements is incorrect about order of a reaction ?

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a

Order of a reaction can never be equal to zero or fractional value.

b

It is always determined experimentally.

c

It is equal to the molecularity for an elementary reaction

d

It is sum of the powers of concentration terms in the differential rate law of  reaction .

answer is A.

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Detailed Solution

The order of a reaction is equal to the sum of powers of the concentration of the reactants in the rate law expression. Order of a reaction can be 0, 1, 2, 3 and even a fraction. A zero order reaction indicates that the rate of reaction is independent from the concentration of reactants.

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