JEE MAIN - Chemistry (2022 - 28th June Evening Shift - No. 17)
$${[Fe{(CN)_6}]^{4 - }}$$
$${[Fe{(CN)_6}]^{3 - }}$$
$${[Ti{(CN)_6}]^{3 - }}$$
$${[Ni{(CN)_4}]^{2 - }}$$
$${[Co{(CN)_6}]^{3 - }}$$
Among the given complexes, number of paramagnetic complexes is ____________.
Answer
2
Explanation
$\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{4-} \quad$ Diamagnetic
$\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-} \quad$ Paramagnetic (1 unpaired electron)
$\left[\mathrm{Ti}(\mathrm{CN})_6\right]^{3-} \quad$ Paramagnetic (1 unpaired electron)
$\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-} \quad$ Diamagnetic
$\left[\mathrm{Co}(\mathrm{CN})_6\right]^{3-} \quad$ Diamagnetic
$\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-} \quad$ Paramagnetic (1 unpaired electron)
$\left[\mathrm{Ti}(\mathrm{CN})_6\right]^{3-} \quad$ Paramagnetic (1 unpaired electron)
$\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-} \quad$ Diamagnetic
$\left[\mathrm{Co}(\mathrm{CN})_6\right]^{3-} \quad$ Diamagnetic
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