The metallic hydroxide which forms a deep inky blue solution with excess ammonium hydroxide solution is:

ICSE Class 10 Chemistry PYQ · 2023 Paper · Section A

1(vi)1 Mark · 2023 · Section A · 2023 Paper

The metallic hydroxide which forms a deep inky blue solution with excess ammonium hydroxide solution is:

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Cu(OH)2

Reason — Cu(OH)2 reacts with a solution of excess ammonium hydroxide to form a deep blue solution of tetrammine copper [II] sulphate.

Cu(OH)2 + (NH4)2SO4 + 2NH4OH ⟶ [Cu(NH3)4]SO4 + 4H2O

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