To a solution of a substance, gradual addition of ammonium hydroxide r – InterviewSolution

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1.	To a solution of a substance, gradual addition of ammonium hydroxide results in a brown ppt. which does not dissolve in excess of NH_4 OH. However, when HCl is added to the original solution, a white ppt. is formed. The solution contained
Answer» LEAD salt silver salt mercurous salt copper salt SOLUTION :black or brown Hg when treated with HCl gives BACK `Hg_(2)Cl_(2)`

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