| Which one of the following forms a colourless solution in aqueous medium? [AIPMT 2000] |
| (Atomic number :\[Sc=21,\text{ }Ti=22,\text{ }V=23,\text{ }Cr=24\]) |
A) \[{{V}^{3+}}\]
B) \[C{{r}^{3+}}\]
C) \[T{{i}^{3+}}\]
D) \[S{{c}^{3+}}\]
Correct Answer: D
Solution :
| [d] The electronic configuration of Sc is |
| \[1{{s}^{2}},\text{ }2{{s}^{2}}2{{p}^{6}},\text{ }3{{s}^{2}}3{{p}^{6}}3{{d}^{1}},\text{ }4{{s}^{2}}\] |
| and configuration of \[S{{c}^{3+}}\] is |
| \[1{{s}^{2}},\text{ }2{{s}^{2}}2{{p}^{6}},\text{ }3{{s}^{2}}3{{p}^{6}}\] |
| So, \[S{{c}^{3+}}\] is colourless due to absence of unpaired electrons in d-orbital. |
You need to login to perform this action.
You will be redirected in
3 sec
