Chemistry
The hydroxide which is soluble in excess of NH4OH is:
- Ferric hydroxide
- Lead hydroxide
- Copper hydroxide
- Calcium hydroxide
Analytical Chemistry
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Answer
Copper hydroxide
Reason — Copper hydroxide reacts with NH4OH to give pale blue precipitate of Cu(OH2). When excess NH4OH is added, Cu(OH)2 dissolves due to the formation of a soluble deep blue complex.
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