List of top Chemistry Questions on Oxidation Number asked in COMEDK UGET

Which one of the following options represents the decreasing order of oxidation number of the central atom in:
\[ \mathrm{Cr_2O_7^{2-}, \; CrO_2^{-}, \; MnO_4^{-}, \; BrO_3^{-}} \]

The oxidation number of Cr in \(CrO_5\) which has the following structure, is: 

$ {SO2 + 2H2S -> 3S + 2H2O}$ . This equation represents preparation of sulphur sol by
The oxidation number of oxygen is -1 in