Which of the following is not soluble in hot and conc

CHEMISTRY · Single correct · ISC · Chemistry · Coordination Compounds · Electrochemistry

Problem

Which of the following is not soluble in hot and conc. HNO3\text{HNO}_3 ? (1) PbS\text{PbS} (2) NiS\text{NiS} (3) CuS\text{CuS} (4) HgS\text{HgS}

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