The spin only magnetic moment value of the ion among $\mathrm{Ti}^{2+}, \mathrm{V}^{2+}, \mathrm{Co}^{3+}$ and $\mathrm{Cr}^{2+}$, that acts as strong oxidising agent in aqueous solution is \_\_\_\_ BM (Near integer). (Given atomic numbers : Ti : 22, V : 23, Cr : 24, Co : 27)

JEE Main · 2024 · 05 Apr 2024 · Shift 1 · d and f Block Elements

The spin only magnetic moment value of the ion among

Ti^{2 +}, V^{2 +}, Co^{3 +}

and

Cr^{2 +}

, that acts as strong oxidising agent in aqueous solution is
____ BM (Near integer).
(Given atomic numbers : Ti : 22, V : 23, Cr : 24, Co : 27)

Answer: 5

In aqueous solution the strong oxidising agent among the ions is

C o^{3 +}

(it is readily reduced to

C o^{2 +}

C o^{3 +}

3 d^{6}

; in the (weak-field, high-spin) aqua environment it has 4 unpaired electrons:

μ = 4 \times 6 = 24 = 4.9 BM \approx 5 BM .

Nearest integer

= 5

JEE Main · 2024 · 05 Apr 2024 · Shift 1 · Integer answer