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

Options

  1. ALead sulphate
  2. BLead nitrate
  3. CLead chromate
  4. DLead iodide

Correct answer

B. Lead nitrate

Step-by-step solution

On adding H 2 SO 4 to Pb 2 + , white precipitate of lead sulphate, PbSO 4 is formed. By adding potassium iodide solution to 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 Pb 2 + –Yellow precipitate of lead chromate is formed. But lead nitrate is a water soluble compound.

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