MDCAT Chemistry MCQ #356

A technician uses Fehling's solution to distinguish between Propanal and Propanone. What observation confirms the presence of the aldehyde?

MDCAT Chemistry MCQ #356

  1. Question 1

    Q1. A technician uses Fehling's solution to distinguish between Propanal and Propanone. What observation confirms the presence of the aldehyde?

    • A) Formation of a silver mirror
    • B) Evolution of hydrogen gas
    • C) Appearance of a brick-red precipitate
    • D) Decolorization of the blue solution

    Answer: Appearance of a brick-red precipitate

    Explanation: Fehling's solution contains Cu2+ ions which are reduced to red Cu2O by aldehydes. Ketones like propanone cannot reduce the copper ions.