question_answer

For the following half cell reactions,\[E{}^\circ \]values are also given \[M{{n}^{2+}}+2{{H}_{2}}O\xrightarrow[{}]{{}}Mn{{O}_{2}}+4{{H}^{+}}+2{{e}^{-}};\] \[E{}^\circ =-1.23V\] \[MnO_{4}^{-}+4{{H}^{+}}+3{{e}^{-}}\xrightarrow[{}]{{}}Mn{{O}_{2}}+2{{H}_{2}}O;\] \[E{}^\circ =+1.70V\] Select correct statements

A) \[M{{n}^{2+}}\]reacts with\[MnO_{4}^{-}\]in acid solution to form\[Mn{{O}_{2}}\]

B) \[Mn{{(Mn{{O}_{4}})}_{2}}\]is stable in acid solution

C) \[Mn{{O}_{2}}\]disproporttbnates to\[M{{n}^{2+}}\]and \[MnO_{4}^{-}\] in acid solution

D)  None of the above