MCQ
Which is diamagnetic ?
- A$[Co(F)_6]^{3-}$
- ✓$[Ni(CN)_4]^{2-}$
- C$[NiCl_4]^{2-}$
- D$[Fe(CN)_6]^{3-}$
✓
Answer
Correct option: B.
$[Ni(CN)_4]^{2-}$
b
Diamagnetic substance have all paired electron.
Diamagnetic substance have all paired electron.
(a) [Fe(CN)6]3- Oxidation state of Fe=+3
It has one unpaired electron and is paramagnetic.
(b) It has two unpaired electrons and is paramagnetic
(c) It has no unpaired electron and is diamagnetic
(d) $\therefore$ It is paramagnetic as it has five unpaired electrons.
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