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BITSAT 2009
Exam
BITSAT
Year
2009
Subject
Chemistry
Chapter
Practical Chemistry

BITSAT 2009 · Chemistry · Practical Chemistry

An aqueous solution of a substance gives a white precipitate on...

An aqueous solution of a substance gives a white precipitate on treatment with dil. HCl which dissolves on heating. When H2S\mathrm{H}_{2} \mathrm{ S} is passed through the hot acidic solution, a black precipitate is obtained. The substance is a

Options

  1. AHg22+\mathrm{Hg}_{2}^{2+} salt
  2. BCu2+\mathrm{Cu}^{2+} salt
  3. CAg+\mathrm{Ag}^{+} salt
  4. DPb2+\mathrm{Pb}^{2+} salt

Correct answer

D. Pb2+\mathrm{Pb}^{2+} salt

Step-by-step solution

PbCl2\mathrm{PbCl}_{2} is insoluble in cold water, soluble in hot water and PbS\mathrm{PbS} is black ppt in acidic medium.
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