NCERT · Class 12 · Chemistry · The d-and f-Block ElementsWhich of the following ions is colored in aqueous solution?
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Step-by-Step Solution
An ion is colored if it has unpaired d-electrons. $Sc^{3+}$ has $3d^0$ (colorless), $Zn^{2+}$ has $3d^{10}$ (colorless), $Ti^{4+}$ has $3d^0$ (colorless), whereas $Ti^{3+}$ has $3d^1$ (one unpaired electron), making it colored.
Detailed Options Breakdown
Option : $Sc^{3+}$
Incorrect choice. This distractor represents a common misunderstanding of the core principles of The d-and f-Block Elements.
Option 1: $Zn^{2+}$
Incorrect choice. This distractor represents a common misunderstanding of the core principles of The d-and f-Block Elements.
Option 2: $Ti^{3+}$ (Correct Answer)
Correct choice. Refer to the step-by-step verified solution guidelines above for details.
Option 3: $Ti^{4+}$
Incorrect choice. This distractor represents a common misunderstanding of the core principles of The d-and f-Block Elements.
💡 Study Guide: This question tests core syllabus concepts from The d-and f-Block Elements. For formulas, key summaries, and mock exam reference guides, read the full The d-and f-Block Elements Revision Notes.