The d-electron configurations of Cr 2+, Mn2+, Fe2+ and Co2+ are d4, d5, d6 and d7, respectively.Which one of the following will exhibit minimum paramagnetic behaviour? [2011] (At, nos. Cr = 24, Mn = 25, Fe = 26, Co = 27)a)[Mn(H2O)6]2+b)[Fe(H2O)6]2+c)[Co(H2O)6]2+d)[Cr(H2O)6]2+Correct answer is option 'C'. Can you explain this answer?

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The d-electron configurations of Cr ²⁺, Mn²⁺, Fe²⁺ and Co²⁺ are d⁴, d⁵, d⁶ and d⁷, respectively.Which one of the following will exhibit minimum paramagnetic behaviour? [2011] (At, nos. Cr = 24, Mn = 25, Fe = 26, Co = 27)

a)
[Mn(H₂O)₆]²⁺
b)
[Fe(H₂O)₆]²⁺
c)
[Co(H₂O)₆]²⁺
d)
[Cr(H₂O)₆]²⁺

Correct answer is option 'C'. Can you explain this answer?

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The d-electron configurations of Cr 2+, Mn2+, Fe2+ and Co2+ are d4, d5...

Minimum paramagnetic behaviour = [Co (H₂O)₆]²⁺

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