Question:

A solution when diluted with H20H_2 0 and boiled, it gives a white precipitate. On addition of excess NH4CI/NH40HNH_4 CI / NH_4 0H, the volume of precipitate decreases leaving behind a white gelatinous precipitate. Identify the precipitate which dissolves in NH4OH/NH4CI.NH_4 OH / NH_4 CI.

Updated On: Jun 14, 2022
  • Zn(OH)2Zn(OH)_2
  • AI(OH)3AI(OH)_3
  • Mg(OH)2Mg(OH)_2
  • Ca(OH)2Ca(OH)_2
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The Correct Option is A

Solution and Explanation

$Zn^{2+} + 2H_2 O \longrightarrow \underset{White}{Zn(OH)_2
\downarrow} + 2H^+$
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