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From a mixed precipitate of $\mathrm{AgCl}$ and $\mathrm{AgI}$, ammonia solution dissolves only $\mathrm{AgCl}$

Ferric ions give a deep green precipitate on adding potassium ferrocyanide solution

On boiling a solution having ${\mathrm{K}}^{+},{\mathrm{Ca}}^{2+}$ and ${\mathrm{HCO}}_3^{-}$ions we get a precipitate of ${\mathrm{K}}_2\mathrm{Ca}{\left({\mathrm{CO}}_3\right)}_2$.

Manganese salts give a violet borax bead test in the reducing flame