Question Bank [2022] — Chemistry STD 12 Science — Question
Maharashtra BoardEnglish MediumSTD 12 ScienceChemistryQuestion Bank [2022]2 Marks
Question
Salt of $Sc^{3+}$ and $Ti^{4+}$ are colourless. Explain why?
✓
Answer
1. Condensed electronic configurations of $Sc ^{3+}$ and $Ti ^{4+}$ are: $Sc ^{3+}:[ Ar ] 3 d^0$ and $Ti ^{4+}$ : $[ Ar ] 3 d^0$, respectively.
2. The ions $Sc ^{3+}$ and $Ti ^{4+}$ have completely empty d-orbitals i.e., no unpaired electrons are present. Thus, their salts are colourless, as d-d transitions are not possible.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.