A reagent which gives brilliant red precipitate with Nickel ions in basic medium is
(1) sodium nitroprusside
(2) neutral $FeCl _3$
(3) meta-dinitrobenzene
(4) dimethyl glyoxime
$Ni^{2+}+2 dmg^{-} \rightarrow\left[Ni(dmg) _2\right]$
Rosy red/Bright Red precipitate
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