MDCAT Chemistry MCQ #681

During the preparation of ethylmagnesium bromide from magnesium and ethyl bromide, the use of perfectly dry ether is strictly required because:

MDCAT Chemistry MCQ #681

  1. Question 1

    Q1. During the preparation of ethylmagnesium bromide from magnesium and ethyl bromide, the use of perfectly dry ether is strictly required because:

    • A) To catalyze the reaction
    • B) To prevent reaction with moisture
    • C) To increase the boiling point
    • D) To act as a reducing agent

    Answer: To prevent reaction with moisture

    Explanation: Dry ether acts as a solvent and stabilizer; moisture would instantly decompose the Grignard reagent into an alkane, ruining the synthesis.