1.

Nessler's reagent is used to detect

Answer»

`CrO_(4)^(2-)`
`PO_(4)^(3-)`
`MnO_(4)^(-)`
`NH_(4)^(+)`

Solution :Nessler's REAGENT gives red PRECIPITATE with `NH_(4)^(+)`
`NH_(4)Cl+2K_(2)[HgI_(4)]+4KOHtounderset("Iodide of Millon's base (BROWN ppt)")(NH_(2)-HG-O-HG-I)+7KI+KCl+3H_(2)O`


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