A unknown inorganic compound (X) gave the following reactions `:` (i) on heating 'X' gave
Channel: Doubtnut
Date: 2020-04-12

A unknown inorganic compound (X) gave the following reactions `:` (i) on heating 'X' gave a residue, oxygen and oxide  of nitrogen. (ii) Addition of acetic acid and `K_(2)Cr_(2)O_(7)` to its aqueous solution give a yellow precipitate. (iii) Addition of NaOH to its aqueous solution first forms a white precipitate, dissolve in the excess of the reagent. Identify the compound (X) and write balanced equation for step (i),(ii), `&` (iii).