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Passing H 2 S in to a mixture of M n 2 + , N i 2 + , C u 2 + and H g 2 + ions in an acidified aqueous solution precipitates

Options

  1. AM n S and C u S
  2. BC u S and H g S
  3. CN i S ad H g S
  4. DM n S and N i S

Correct answer

B. C u S and H g S

Step-by-step solution

H 2 S in presence of aqueous solution precipitates sulphide of C u and H g (IInd group) apart from P b + 2 , B i + 3 , C d + 2 , A s + 3 , S b + 3 and S n + 2 , M n 2 + , N i 2 + are of IVth group so cannot be precipitated by H 2 S .

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