MDCAT Chemistry MCQ #3956

In Lassaigne's test, the appearance of a Prussian blue color after adding ferrous sulfate and ferric chloride confirms the presence of:

MDCAT Chemistry MCQ #3956

  1. Question 1

    Q1. In Lassaigne's test, the appearance of a Prussian blue color after adding ferrous sulfate and ferric chloride confirms the presence of:

    • A) Nitrogen
    • B) Sulfur
    • C) Chlorine
    • D) Phosphorus

    Answer: Nitrogen

    Explanation: Prussian blue indicates nitrogen presence in Lassaigne's test. Sodium nitroprusside is tempting but it is used to detect sulfur.