List of top Chemistry Questions on Oxidation Number asked in AIIMS

The oxidation state of chromium in the final product formed by the reaction between $KI$ and acidified potassium dichromate solution is

Oxidation state of $Fe$ in $Fe ( CO )_{5}$ is zero. $EAN$ of $Fe$ in this complex is $36$.

$MnO _{4}^{-}$is of intense pink colour, though $Mn$ is in $+7$ oxidation state. It is due to

The element which forms oxides in all oxidation states $+1$ to $+5$ is

Oxidation state of osmium (Os) in $OsO_4$ is

The oxidation number of oxygen atom in $O^{2-}_2$ ion is