MDCAT Chemistry MCQ #484

A 10.0 g sample of a ketone reacts with 20.0 g of NaHSO3. What is the excess reagent?

MDCAT Chemistry MCQ #484

  1. Question 1

    Q1. A 10.0 g sample of a ketone reacts with 20.0 g of NaHSO3. What is the excess reagent?

    • A) Ketone
    • B) NaHSO3
    • C) Neither
    • D) Both

    Answer: Ketone

    Explanation: Molar ratio is 1:1. 10.0 g / 58 g/mol ≈ 0.17 mol; 20.0 g / 104 g/mol ≈ 0.19 mol. Ketone is limiting (B reverses roles).