When a nitrate is warmed with zinc powder and an NaOH solution

CHEMISTRY · Single correct · ICSE · Chemistry · Analytical Chemistry · IGCSE

Problem

When a nitrate is warmed with zinc powder and an NaOH solution, a gas is evolved. Which of the following reagents will be turned brown by the gas? (1) Sodium nitroprusside (2) Sodium cobaltinitrite (3) Nessler's reagent (4) Barium chloride

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