Grignard reagents and carbon chain extension

Grignard reagents and carbon chain extension Quiz

Spec 20.2 · Edexcel International A Level Chemistry: Quiz

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5 questions, one answer each

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  1. 1. Which solvent is used to make a Grignard reagent?

    • A. Dry ethoxyethane
    • B. Water
    • C. Aqueous ethanol
    • D. Dilute sulfuric acid

  2. 2. What is the final product of CH₃MgBr with propanone, followed by dilute acid?

    • A. Propan-2-ol
    • B. Butan-2-ol
    • C. 2-methylpropan-2-ol
    • D. 2-methylpropan-1-ol

  3. 3. Why is the carbon bonded to magnesium nucleophilic?

    • A. It is δ+ because Mg is electronegative
    • B. It is δ− because Mg is less electronegative than carbon
    • C. It has a full outer shell
    • D. It carries a positive charge

  4. 4. How many carbon atoms does the carboxylic acid have if made from 1-bromobutane using Mg, CO₂ and H⁺?

    • A. 4
    • B. 3
    • C. 6
    • D. 5

  5. 5. A Grignard preparation gives mostly alkane. What is the most likely cause?

    • A. The ether was too cold
    • B. Too much magnesium was used
    • C. Water was present
    • D. The reaction was heated for too long

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