Is a metal hydroxide fully or partly oxidised in insufficient base?
What you are worried seems to be in your comment, which I'm explaining[maybe not]

Oxidations:


  $$\ce{NiOOH + H2O + e- -&gt; Ni(OH)2 + OH-} \quad E^{\circ}=+0.49\\
\ce{Ni2O3(s) + 6H+ + 2e- -&gt; 2Ni^2+ + 3H2O} \quad E^{\circ}=+1.753\\$$


I suppose if you know about electrode potential you might be able to understand now,If you wish I might explain it, if you can't on your own.