A metal chloride original solution (i.e., O.S) on mixing with ${\mathrm{K}}_2{\mathrm{CrO}}_4$ solution gives a yellow precipitate soluble in aqeuous sodium hydroxide.
The metal may be:

A lead chloride original solution (i.e., O.S) on mixing with ${\mathrm{K}}_2{\mathrm{CrO}}_4$ solution gives a yellow precipitate soluble in aqeuous sodium hydroxide.

$$\begin{gathered} {\mathrm{Pb}}^{2+}+{\mathrm{CrO}}_4^{2-}\to {\mathrm{PbCrO}}_4\downarrow \text{ (yellow), }{\mathrm{PbCrO}}_4\downarrow +4{\mathrm{OH}}^{-} \\ \to {\left[\mathrm{Pb}(\mathrm{OH}{)}_4\right]}^{2-}+{\mathrm{CrO}}_4^{2-} \end{gathered}$$