Chemistry - Salt Analysis Question with Solution | TestHub

Paragraph:When a metal rod $M$ is dipped into an aqueous colourless concentrated solution of compound $\mathrm{N}$, the solution turns light blue. Addition of aqueous $\mathrm{NaCl}$ to the blue solution gives a white precipitate $\mathrm{O}$. Addition of aqueous ${\mathrm{NH}}_3$ dissolves $\mathrm{O}$ and gives an intense blue solution.