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Question
A solution when diluted with H2O and boiled, it gives a white precipitate. On addition of excess NH4Cl/NH4OH. the volume of precipitate decreases leaving behind a white gelatinous precipitate. Identify the precipitate which dissolves in NH4OH/NH4Cl.
Options
A.Zn (OH)2
B.Al(OH)3
C.Mg(OH)2
D.Ca(OH)2
Solution
Due to formation of tetraammine zinc (II) complex; Zn+2 + NH4OH → [Zn(NH3)4]+2
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