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The d- electron configurations of Cr3+, Mn2+ , Fe2+, and Co2+ are d4 ,d5, d6 and d7 respectively. Which one of the following will exhibit minimum paramagnetic behaviour?(At. no. Cr = 24, Mn = 25, Fe =26, Co = 27)
[Fe(H2O)6]2+
[Co(H2O)6]2+
[Cr(H2O)6]2+
[Mn(H2O)6]2+
