alleryWhy is Sc³⁺ colorless?
ARandom
BLight
CRandom
DSc³⁺ is 3d⁰ — no d electron for d-d transition
Answer & Solution
Correct answer: D. Sc³⁺ is 3d⁰ — no d electron for d-d transition
Sc³⁺: [Ar] 3d⁰. No d electron. No d-d transition.
Hence colorless.
**Same logic:** Ti⁴⁺ (3d⁰), V⁵⁺, Cr⁶⁺ would be colorless from d-d perspective (intense color in CrO₄²⁻ comes from LMCT).
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