The $3d$ metal ions form coloured compounds because the energy corresponding to the following lies in the visible range of electromagnetic spectrum
The $3d$ metal ions form coloured compounds because the energy corresponding to the following lies in the visible range of electromagnetic spectrum
- A
Free energy change of complex formation by $3d$ metal ions
- B
$d - d$ transitions of $3d$ electrons
- C
Heat of hydration of $3d$ metal ions
- D
Ionisation energy of $3d$ metal ions
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