Analytical ChemistryHard
Question
A metal chloride original solution (i.e. O.S) on mixing with K2CrO4 solution gives a yellow precipitate soluble in aqueous sodium hydroxide. The metal may be :
Options
A.mercury
B.iron
C.silver
D.lead
Solution
Pb2+ + CrO42- → PbCrO4 ↓ (yellow) ; PbCrO4 ↓ + 4OH- → [Pb(OH)4]2- + CrO42-.
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