JEE Main 2022 · 28 Jun · Shift 2 · Chemistry Q86

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ChemistryInteger+4 / -1Question 86 of 90

$\mathrm{[Fe(CN)_6]^{4-}}$

$\mathrm{[Fe(CN)_6]^{3-}}$

$\mathrm{[Ti(CN)_6]^{3-}}$

$\mathrm{[Ni(CN)_4]^{2-}}$

$\mathrm{[Co(CN)_6]^{3-}}$

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

Your answer

Answer and worked solution

Official answer: 2

Unpaired electrons. $\mathrm{[Fe(CN)_6]^{4-}}$ 0, $\mathrm{[Fe(CN)_6]^{3-}}$ 1, $\mathrm{[Ti(CN)_6]^{3-}}$ 1, $\mathrm{[Ni(CN)_4]^{2-}}$ 0, $\mathrm{[Co(CN)_6]^{3-}}$ 0. Two paramagnetic.

Answer: 2

Topics:Magnetic properties and colour Crystal field theory

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JEE Main 2022 · 28 Jun · Shift 2, Chemistry question 86