Consider the following statements for $\left[\mathrm{FeO}_{4}\right]^{2-}$
\[ \begin{array}{l} \text{(A) It is stable in the pH range 0-14} \\ \text{(B) It is stable in strongly basic medium only} \\ \text{(C) It is a very strong oxidizing agent} \\ \text{(D) The isomer shift in its Mossbauer spectrum is more negative compared to that of } \mathrm{FeCl_3}. \end{array} \]
The correct statements are
(a)A, C and D
(b)B, C and D
(c)B and C
(d)C and D
Answer
Answer: B ✓ checked by 4AB · confidence high
Explanation
Ferrate(VI) is stable only in strongly basic solution and is a very strong oxidant. Its higher s-electron density gives a more negative isomer shift than Fe(III) in FeCl₃. B, C and D (b).