engineering chemistry MCQ #4915

For a first-order reaction, the rate constant is 0.02 s-1. What is the half-life?

engineering chemistry MCQ #4915

  1. Question 1

    Q1. For a first-order reaction, the rate constant is 0.02 s-1. What is the half-life?

    • A) 34.65 s
    • B) 43.32 s
    • C) 20 s
    • D) 50 s

    Answer: 34.65 s

    Explanation: For a first-order reaction, t1/2 = ln(2) / k = 0.693 / 0.02 = 34.65 s, using the formula t1/2 = ln(2) / k.