alleryCompounds of transition metals are usually:
AColorless
BAlways white
COften COLORED (due to d-d electronic transitions)
DBlack
Answer & Solution
Correct answer: C. Often COLORED (due to d-d electronic transitions)
d-d transitions absorb visible light → complementary color visible.
**Exceptions:** d⁰ (colorless, e.g., Sc³⁺, Ti⁴⁺) and d¹⁰ (colorless, e.g., Cu⁺, Zn²⁺) ions have no d-d transitions.
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