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  • Nessler's reagent is used to detectOption: 1 <img alt="\mathrm{CrO}_{4}^{2-}" src="https://entrancecorner.oncodecogs.com/gif.latex?%5Cmathrm%7BCr

Nessler's reagent is used to detect

Option: 1

\mathrm{CrO}_{4}^{2-}


Option: 2

\mathrm{PO}_{4}^{3-}


Option: 3

\mathrm{MnO}_{4}^{-}


Option: 4

\mathrm{NH}_{4}^{+}


Answers (1)

best_answer

As we have learnt,

Nessler's reagent is used for the detection of Ammonium ions and forms a brown precipitate with \text{NH}_{4}^{+}

\mathrm{NH _{4} Cl +2 K _{2}\left[ HgI _{4}\right]+4 KOH \rightarrow \underset{Iodide\ of\ Milon's\ base}{NH _{2}- Hg - O - Hg - I} +7 KI + KCl +3 H _{2} O}Hence, the correct answer is Option (4)

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