Formation of which complex, among the following, is not a confirmatory test of Pb 2 + ions

On adding ${\mathrm{H}}_2{\mathrm{SO}}_4$ to ${\mathrm{Pb}}^{2+}$, white precipitate of lead sulphate, ${\mathrm{PbSO}}_4$ is formed.  By adding potassium iodide solution to ${\mathrm{Pb}}^{2+}$ - Yellow precipitate of lead iodide is formed. The ppt dissolves in boiling water and on cooling recrystallises. 

By adding potassium chromate solution to ${\mathrm{Pb}}^{2+}$–Yellow precipitate of lead chromate is formed. But lead nitrate is a water soluble compound.