EasyRe-NEET 2026
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Among the species given below, the spin only magnetic moment is highest for (Given : Atomic number of Ti = 22, Mn = 25, Fe = 26 and Co = 27)
A
[Mn(CN)₆]³⁻
B
[Fe(CN)₆]³⁻
C
[Co(NH₃)₆]³⁺
D
[Ti(H₂O)₆]³⁺
Explanation
A) [Mn(CN)₆]³⁻ ⇒ d²sp³ ⇒ Mn³⁺ = 3d⁴ ⇒ Maximum no. of unpaired e⁻ so highest spin only magnetic moment. (B) [Fe(CN)₆]³⁻ ⇒ d²sp³ ⇒ Fe³⁺ = 3d⁵ ⇒ n = 1 (C) [Co(NH₃)₆]³⁺ ⇒ d²sp³ ⇒ Co³⁺ = 3d⁶ ⇒ n = 0 (D) [Ti(H₂O)₆]³⁺ ⇒ d²sp³ ⇒ Ti³⁺ = 3d¹ ⇒ n = 1
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