The most stable ion is :
(a) \( \left[\mathrm{Fe}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\...
The most stable ion is :
(a) \( \left[\mathrm{Fe}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]^{3-} \)
(b) \( \left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-} \)
(c) \( \left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-} \)
(d) \( \left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+} \)
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