Verified Solution • 2025–26 Session moderate

QJEEM22Chfc9c: JEE Main 2022 Chemistry - Class 12 JEEM22Chfc9c Solution: [ F e ( C N ) 6 ] 4 − [ F e ( C N ) 6 ] 3 − [ T i ( C N ) 6 ] 3 …

[Fe(CN)6]4−

[Fe(CN)6]3−

[Ti(CN)6]3−

[Ni(CN)4]2−

[Co(CN)6]3−

Among the given complexes, number of paramagnetic complexes is ____________.

Step-by-Step Verified Solution

[Fe(CN)6]4−\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{4-} \quad Diamagnetic

[Fe(CN)6]3−\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-} \quad Paramagnetic (1 unpaired electron)

[Ti(CN)6]3−\left[\mathrm{Ti}(\mathrm{CN})_6\right]^{3-} \quad Paramagnetic (1 unpaired electron)

[Ni(CN)4]2−\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-} \quad Diamagnetic

[Co(CN)6]3−\left[\mathrm{Co}(\mathrm{CN})_6\right]^{3-} \quad Diamagnetic

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