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Nessler's reagent, an alkaline solution of , is used to detect the radical (Zero Group). A positive Qualitative and Quantitative Analysis Chemistry Question

Question

Nessler's reagent, an alkaline solution of $K_2HgI_4$, is used to detect the $NH_4^+$ radical (Zero Group). A positive test yields a brown precipitate chemically known as:

Answer: A

💡 Solution & Explanation

The brown precipitate formed by ammonia with Nessler's reagent is called the Iodide of Millon's base, with the chemical formula $HgO \cdot Hg(NH_2)I$.

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