MDCAT Chemistry MCQ #5116

For a first-order reaction, the half-life is 20 minutes. What is the rate constant (in min^-1)?

MDCAT Chemistry MCQ #5116

  1. Question 1

    Q1. For a first-order reaction, the half-life is 20 minutes. What is the rate constant (in min^-1)?

    • A) 0.0347
    • B) 0.693
    • C) 0.0200
    • D) 0.347

    Answer: 0.0347

    Explanation: For a first-order reaction, t1/2 = 0.693/k. Thus, k = 0.693/20 = 0.0347. Option B is the value of 0.693, not k.