Same chapter3 marksDifficulty: Medium
A white precipitate is formed when sodium hydroxide is added to a salt solution, and it does not dissolve in excess. Name the cation and state one further test.
Analytical Chemistry
1 markDifficulty: Medium
A white precipitate that dissolves in excess sodium hydroxide but not in excess ammonium hydroxide indicates:
- aZn2+
- bPb2+
- cCa2+
- dFe2+
Original Khojo Papers practice question — not from a past board paper.
Answer
Pb2+
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
Zinc hydroxide dissolves in excess of both reagents, which is what distinguishes it from lead.
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