MDCAT Chemistry MCQ #5098

For the reaction NO2 + CO -> NO + CO2 at low temperature, the mechanism involves 2NO2 -> NO3 + NO (slow). What is the rate law?

MDCAT Chemistry MCQ #5098

  1. Question 1

    Q1. For the reaction NO2 + CO -> NO + CO2 at low temperature, the mechanism involves 2NO2 -> NO3 + NO (slow). What is the rate law?

    • A) Rate = k[NO2][CO]
    • B) Rate = k[NO2]
    • C) Rate = k[CO]
    • D) Rate = k[NO2]^2

    Answer: Rate = k[NO2]^2

    Explanation: The rate is determined by the slow step involving two NO2 molecules. Option B fails because CO is not in the rate-determining step.