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Which of the following statement is incorrect about the molecularity of a reaction?

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Which of the following statement is incorrect about the molecularity of a reaction?

(a) It is a theoretical concept

(b) Each step of a multi-step reaction has a unique molecularity

(c) It  is equal to the total number of reactants taking part in elementary step

(d) It can be zero, fractional or integer

The question was asked in an interview for internship.

Question is taken from Molecularity of a Reaction topic in division Reaction Dynamics of Engineering Chemistry I

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The correct choice is (d) It can be zero, fractional or integer

Explanation: Molecularity is always a whole number. It can be neither zero nor fractional. All the other options are correct.

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