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IIT JEE Advanced 2006 Paper 1

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Question : 42

Total: 120

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.

Zn(OH)2
Al(OH)3
Mg(OH)2
Ca(OH)2

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