| 1. \[C{{u}^{2+}}\] 2. \[T{{i}^{4+}}\] 3. \[C{{o}^{2+}}\] 4. \[F{{e}^{2+}}\] |
A) 1, 2, 3, 4
B) 1, 3, 4
C) 2, 3
D) 1, 2
Correct Answer: B
Solution :
[b] \[C{{u}^{2+}}[Ar]3{{d}^{9}},T{{i}^{4+}}[Ar]3{{d}^{0}},C{{o}^{2+}},[Ar]3{{d}^{7}}\] \[F{{e}^{2+}}[Ar]3{{d}^{6}}\] 1, 3, 4 are coloured ions hence the answer is b.
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