Question

For a reaction with negative order n, which one of the following is true about reaction rate constant?

(a) k = (-rA)

(b) k = 1

(c) k = \(\frac{-r_A}{C_A^n} \)

(d) k =  (-rA) × CA^n

I have been asked this question during an interview.

The origin of the question is Reaction Kinetics Elements in section Elements of Reaction Kinetics of Chemical Reaction Engineering

Answer 1

The correct answer is (d) k =  (-rA) × CA^n

Best explanation: For n<0, (-rA) = kCA^n

Hence, k = (-rA) × CA^n