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JAMB Chemistry 2011 Paper
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Question : 30
Total: 47
A few drops of concentrated HNO
3
is added to an unknown solution and boiled for a while. If this produces a brown solution, the cation present is likely to be
Pb
2+
Cu
2+
Fe
3+
Fe
2+
Validate
Solution:
The brown color indicates the presence of iron (III) (Fe
3
+
).
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