In which of the following order the given complex ions are arranged correctly with respect to their decreasing spin only magnetic moment?
(i) \(\left[ FeF _6\right]^{3-}\),
(ii) \(\left[ Co \left( NH _3\right)_6\right]^{3+}\),
(iii) \(\left[ NiCl _4\right]^{2-}\),
(iv) \(\left[ Cu \left( NH _3\right)_4\right]^{2+}\)

[JEE Main 2021, 25 Feb (Shift 2)]

Question

In which of the following order the given complex ions are arranged correctly with respect to their decreasing spin only magnetic moment?
(i) \(\left[ FeF _6\right]^{3-}\),
(ii) \(\left[ Co \left( NH _3\right)_6\right]^{3+}\),
(iii) \(\left[ NiCl _4\right]^{2-}\),
(iv) \(\left[ Cu \left( NH _3\right)_4\right]^{2+}\)

[JEE Main 2021, 25 Feb (Shift 2)]

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