Question

For any order n, the rate constant is expressed as ____

(a) (-rA)

(b) (-rA) × CA^n

(c) (-rA) × CA

(d) \(\frac{-r_A}{C_A^n} \)

I have been asked this question during an online exam.

I'm obligated to ask this question of Reaction Kinetics Elements topic in chapter Elements of Reaction Kinetics of Chemical Reaction Engineering

Answer 1

Right option is (d) \(\frac{-r_A}{C_A^n} \)

For explanation I would say: For any order n, (-rA) = kCA^n. Hence, k = \(\frac{-r_A}{C_A^n}. \)