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An aqueous solution of a substance gives a white precipitate on treatment with dil. HCl which dissolves on heating. When H ₂ ~S is passed through the hot acidic solution, a black precipitate is obtained. The substance is a

Options

  1. AHg ₂²⁺ salt
  2. BCu ²⁺ salt
  3. CAg ⁺ salt
  4. DPb ²⁺ salt

Correct answer

D. Pb ²⁺ salt

Step-by-step solution

PbCl ₂ is insoluble in cold water, soluble in hot water and PbS is black ppt in acidic medium.

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