MDCAT Chemistry MCQ #5152

The decomposition of H2O2 is a first-order reaction. If the rate constant is 0.05 min^(-1), what is the time required for 75% decomposition?

MDCAT Chemistry MCQ #5152

  1. Question 1

    Q1. The decomposition of H2O2 is a first-order reaction. If the rate constant is 0.05 min^(-1), what is the time required for 75% decomposition?

    • A) 27.72 min
    • B) 13.86 min
    • C) 41.58 min
    • D) 55.44 min

    Answer: 27.72 min

    Explanation: For 75% decomposition, t = ln(4)/k = ln(4)/0.05 = 27.72 min.