Why does Zn²⁺ have no color (Zn = d¹⁰)?
ANo d-d transition possible — d sub-shell full
BReflects all light
CMass
DRandom
Answer & Solution
Correct answer: A. No d-d transition possible — d sub-shell full
Zn²⁺: 3d¹⁰. No empty d orbital to receive a promoted electron. So no d-d transition in visible. Hence Zn²⁺ salts are colorless. Same for Sc³⁺ (d⁰), Cu⁺ (d¹⁰).
Related questions
Which of the following coordination compounds shows OPTICAL ISOMERISM?The HEXACYANIDOFERRATE(II) ion $[\mathrm{Fe(CN)_6}]^{4-}$ contains iron in oxidation state$[\mathrm{Ni(CO)_4}]$ is tetrahedral and diamagnetic. The oxidation state of nickel in thiCoordination compounds of transition metals are often COLOURED. CFT explains this colour aWhich of the following best states the CHELATE EFFECT?Cis-trans isomerism is observed in$[\mathrm{Fe(CN)_6}]^{4-}$ has $\mathrm{CN^-}$ ligands, which are STRONG-FIELD ligands. ThIn CRYSTAL FIELD THEORY (CFT) for an OCTAHEDRAL complex, the five degenerate d-orbitals of