KI solution identifies

Treatment of alkaline KMnO_4 solution with KI solution oxidizes iodide to:

To a metal nitrate, when KI solution is added, a black precipitate is produced at first , on additing excess of KI, orange solution is produced. Identify the meatl ion

KI solution is the reagent for :

KI solution is the reagent for:

KI solution is the reagent for:

O_(3) with KI solution produces