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A metal chloride original solution `(i.e. O.S)` on mixing with `K_(2)CrO_(4)` solution gives a yellow precipitate soluble in aqueous sodium hydroxide.

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A metal chloride original solution `(i.e. O.S)` on mixing with `K_(2)CrO_(4)` solution gives a yellow precipitate soluble in aqueous sodium hydroxide. The metal may be `:`
A. mercury
B. iron
C. silver
D. lead
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`Pb^(2+)+CrO_(4)^(2-)rarrPbCrO_(4)darr("yellow"),PbCrO_(4)darr+4OH^(-)rarr[Pb(OH)_(4)]^(2-)+CrO_(4)^(2-)`
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