Determine the rate law for first order reaction 2A → R at constant pressure with 60% A in the initial reaction mixture and reduces by 15% in 4 minutes.

(a) -rA = 0.17 CA

(b) -rA = CA

(c) -rA = 2CA

(d) -rA = 3.6CA

I had been asked this question in an online quiz.

My doubt stems from Batch Reactor Design Equations in division Ideal Reactors for a Single Reaction, Conversion and Reactor Sizing of Chemical Reaction Engineering

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