engineering chemistry MCQ #4916

The rate law for the reaction 2A + B -> C is rate = k[A]²[B]. If [A] is doubled and [B] is halved, the rate will be

engineering chemistry MCQ #4916

  1. Question 1

    Q1. The rate law for the reaction 2A + B -> C is rate = k[A]²[B]. If [A] is doubled and [B] is halved, the rate will be

    • A) double
    • B) half
    • C) unchanged
    • D) quadrupled but then halved, so doubled

    Answer: quadrupled but then halved, so doubled

    Explanation: New rate = k(2[A])²([B]/2) = k(4[A]²)([B]/2) = 2k[A]²[B], so the rate is doubled.