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Chemistry Question on coordination compounds

Correct order of spin only magnetic moment of the following complex ions is:
(Given At.no. Fe: 26, Co:27)

A

[FeF6]3−>[Co(C2O4)3]3−>[CoF6]3− [FeF_6]^{3−} >[Co(C_2O_4)_3]^{3−}>[CoF_6]^{3−}

B

[FeF6]3−>[CoF6]3−>[Co(C2O4)3]3−[FeF_6]^{3−}>[CoF_6]^{3−}>[Co(C_2O_4)_3]^{3−}

C

[Co(C2O4)3]3−>[CoF6]3−>[FeF6]3−[Co(C_2O_4)_3]^{3−}>[CoF_6]^3−>[FeF_6]^{3−}

D

[CoF6]3−>[FeF6]3−>[Co(C2O4)3]3−[CoF_6]^{3−}>[FeF_6]^{3−}>[Co(C_2O_4)_3]^{3−}

Answer

[FeF6]3−>[CoF6]3−>[Co(C2O4)3]3−[FeF_6]^{3−}>[CoF_6]^{3−}>[Co(C_2O_4)_3]^{3−}

Explanation

Solution

The correct option is (B): [FeF6]3−>[CoF6]3−>[Co(C2O4)3]3−[FeF_6]^{3−}>[CoF_6]^{3−}>[Co(C_2O_4)_3]^{3−}.