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NEET CHEMISTRYEasy

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

A

Order is not influenced by the stoichiometric coefficient of the reactants.

B

Order of reaction is the sum of power to the concentration terms of reactants to express the rate of reaction.

C

The order of reaction is always a whole number.

D

Order can be determined by experiments only.

Step-by-Step Solution

The order of a chemical reaction has specific characteristics defined in the NCERT text:

  1. Definition: It is defined as the sum of powers of the concentration of the reactants in the rate law expression .
  2. Experimental determination: The order is an experimental quantity and cannot be predicted merely by looking at the stoichiometric coefficients of the balanced chemical equation .
  3. Values: Unlike molecularity, which is always an integer, the order of a reaction can be 0, 1, 2, 3, and even a fraction . Therefore, the statement that it is 'always a whole number' is incorrect.
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