Select the incorrect statement(s).

Unit of pre-exponential factor (A) for a second order reaction is mol L⁻¹ s⁻¹.
A zero order reaction must be a complex reaction.
Molecularity is defined only for the RDS in a complex reaction.
Rate constant (k) remains unaffected on changing temperature.

Correct answer: Rate constant (k) remains unaffected on changing temperature.

Solution

The rate constant k changes (roughly doubles per 10 deg C) with temperature per the Arrhenius equation, so the statement that k is unaffected by temperature is clearly incorrect; this is the most clearly wrong option.

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