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
-
A.
Pb2+ -
B.
Cu2+ -
C.
Fe3+ -
D.
Fe2+
Correct Answer: Option C
Explanation
The brown color indicates the presence of iron (III) (Fe(^{3+})).