Solution of ZnS in dil. HCl when treated NaoH solution a white Precipitate is formed which dissolves in excess of NaOHdue to formation of

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Na2ZnO2

ZnCl2

ZnOHCl

ZnOH2

answer is A.

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Detailed Solution

ZnS+2HCl→ZnCl2+H2S ZnCl2+2NaOH→ZnOH2+2H2O ZnOH2+2NaOH→Na2ZnO2+2H2O

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