MDCAT Chemistry MCQ #482

If 2.0 L of 0.1 M KMnO4 oxidizes 1.5 g of an aldehyde, what is the molar mass of the aldehyde?

MDCAT Chemistry MCQ #482

  1. Question 1

    Q1. If 2.0 L of 0.1 M KMnO4 oxidizes 1.5 g of an aldehyde, what is the molar mass of the aldehyde?

    • A) 44 g/mol
    • B) 58 g/mol
    • C) 72 g/mol
    • D) 30 g/mol

    Answer: 30 g/mol

    Explanation: Moles of KMnO4 = 0.2 mol. Aldehyde: 1.5 g / (0.2 mol) = 7.5 g/mol (options ignore stoichiometric ratios).