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P b 2 + , C u 2 + , Z n 2 + and N i 2 + ions are present in a given acidic solution. On passing hydrogen sulphide gas through this solution, the available precipitate will contain

Options

  1. AP b S and N i S
  2. BP b S and C u S
  3. CC u S and Z n S
  4. DC u S and N i S

Correct answer

B. P b S and C u S

Step-by-step solution

Pb 2+ and Cu 2+ are precipitated as sulphides because of their lower solubility products, where as sulphide of other metals remain in the solution because of their high solubility products.

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