List of top Chemistry Questions on Oxidation Number asked in KEAM

In the following redox reaction,  \(P_{4(s)} + 3OH^-_{(aq)} + 3H_2O_{(l)} \)\(\rightarrow PH_{3(g)} + \)\(3H_2PO_2^-\)  the oxidation state of phosphorus changes from:

The average oxidation state of sulphur in the tetrathionate ion is:
In the reaction \( 3Mg + N_2 \rightarrow Mg_3N_2 \), the oxidation number of Mg changes is:
Amount of charge needed to dissociate MgClâ‚‚?
The sum of the oxidation numbers of all the carbon and oxygen atoms in carbonate ion is:
The average oxidation number of bromine in Br3O8 is
The most stable +2 oxidation state is exhibited by: