MDCAT Chemistry MCQ #704

The rate of an SN2 reaction between methyl chloride and OH- is 0.04 mol/L.s. If the concentration of OH- is halved, what is the rate?

MDCAT Chemistry MCQ #704

  1. Question 1

    Q1. The rate of an SN2 reaction between methyl chloride and OH- is 0.04 mol/L.s. If the concentration of OH- is halved, what is the rate?

    • A) 0.01 mol/L.s
    • B) 0.02 mol/L.s
    • C) 0.04 mol/L.s
    • D) 0.08 mol/L.s

    Answer: 0.02 mol/L.s

    Explanation: SN2 rate is proportional to nucleophile concentration; halving [OH-] halves the rate from 0.04 to 0.02. Option D incorrectly suggests the rate quadruples.