An inorganic salt is strongly heated

CHEMISTRY · Single correct · GCSE · Chemistry · Chemical Analysis · Chemical Analysis

Problem

An inorganic salt is strongly heated. The residue is yellow when hot and white when cold. The salt contains: (1) Pb2+Pb^{2+} (2) Zn2+Zn^{2+} (3) Hg2+Hg^{2+} (4) NH4+NH_4^+

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