MDCAT Chemistry MCQ #700

In an SN1 reaction, the rate is 0.002 mol/L.s when [RX] is 0.1M. If [RX] is increased to 0.2M, what is the new rate?

MDCAT Chemistry MCQ #700

  1. Question 1

    Q1. In an SN1 reaction, the rate is 0.002 mol/L.s when [RX] is 0.1M. If [RX] is increased to 0.2M, what is the new rate?

    • A) 0.001 mol/L.s
    • B) 0.002 mol/L.s
    • C) 0.004 mol/L.s
    • D) 0.008 mol/L.s

    Answer: 0.004 mol/L.s

    Explanation: SN1 is first-order; doubling the substrate concentration doubles the rate from 0.002 to 0.004. Option D assumes a second-order nucleophilic dependence.