The correct increasing order of spin-only magnetic moment values of the complex ions [2026]

Question

The correct increasing order of spin-only magnetic moment values of the complex ions [2026]

${[{MnBr}_{4}]}^{2 -}$ $(A)$ $, {[Cu {(H_{2} O)}_{6}]}^{2 +}$ $(B)$ $, {[Ni {(CN)}_{4}]}^{2 -}$ $(C)$ and ${[Ni {(H_{2} O)}_{6}]}^{2 +}$ (D) is:

Smart Achievers · Accepted Answer

(4)

${Mn}^{2 +} 3 d^{5} n = 5$

${Cu}^{2 +} 3 d^{9} t_{2 g}^{2, 2, 2} e_{g}^{2, 1} n = 1$

${Ni}^{2 +} 3 d^{8} square planar n = 0$

${Ni}^{2 +} 3 d^{8} tetrahedral e_{g}^{2, 2} t_{2 g}^{2, 1, 1} n = 2$

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