JEE Main 2022 · 26 Jul · Shift 2 · Chemistry Q87

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ChemistryInteger+4 / -1Question 87 of 90

The spin-only magnetic moment value of the compound with strongest oxidizing ability among $\mathrm{MnF_4}$ , $\mathrm{MnF_3}$ and $\mathrm{MnF_2}$ is ______ B.M. [nearest integer]

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Answer and worked solution

Official answer: 5

Strongest oxidant. NTA's key takes $\mathrm{MnF_3}$ : $\mathrm{Mn^{3+}}$ is very strongly oxidising ( $E^\circ_{\mathrm{Mn^{3+}/Mn^{2+}}}\approx1.5$ V) because it gains the stable $d^5$ configuration.

$\mathrm{Mn^{3+}}$ is $d^4$ , with 4 unpaired electrons: $\sqrt{24}\approx4.9\approx5$ B.M.

Answer: 5

Topics:Transition element properties Magnetic properties and colour

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JEE Main 2022 · 26 Jul · Shift 2, Chemistry question 87