Chemical KineticsmediumMCQ SINGLE

For the irreversible reaction: A → products in a batch reactor, 80% reactant ([A0] = 1 M) is convertChemical Kinetics Chemistry Question

Question

For the irreversible reaction: A → products in a batch reactor, 80% reactant ([A0] = 1 M) is converted in a 8 min run and conversion is 90% after 18 min. The order of this reaction is

Answer: B

💡 Solution & Explanation

Check for 2nd order: k*t = 1/[A] - 1/[A0]. For 8 min: k(8) = 1/0.2 - 1/1 = 4. For 18 min: k(18) = 1/0.1 - 1/1 = 9. Ratio: 18/8 = 2.25 and 9/4 = 2.25. The data perfectly fits a second-order integrated rate law. Therefore, correct answer is B.

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