MCQ
The $3d-$ metal ions are paramagnetic in nature because
- AThey are reducing agents
- BThey form coloured salts
- CThey have one or more paired $ s-$ electrons
- ✓They have one or more unpaired $ d-$ electrons
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(Atomic No. $Y = 39$, $La = 57$, $Eu = 63$, $Lu = 71$)
