A reagent which gives brilliant red precipitate with Nickel ions in basic medium is

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We need a reagent that produces a "brilliant red precipitate" with  ions under basic conditions (typically an ammonium hydroxide medium).
- Sodium nitroprusside: Used for sulphide () detection, giving a purple color.
- Neutral : Used to detect phenols and certain ions like acetate, giving characteristic colored solutions, not red precipitates with Nickel.
- Meta-dinitrobenzene: Forms colored complexes via Janovsky reaction, mostly for active methylene compounds.
- Di

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