Calculate the oxidation number of $C$ in glucose $(C_{6}H_{12}O_{6})$.

What is the oxidation number of carbon in oxalic acid?

When $KMnO_4$ is reduced with oxalic acid in acidic solution,the oxidation number of $Mn$ changes from

What is the difference in the oxidation number of nitrogen when nitric acid is converted into nitrous oxide?

Compounds having the highest oxidation state of the central atom act as acids,the lowest ones act as bases,and intermediate oxidation states act as amphoteric. Which one of the following is amphoteric?

The oxidation number of sulphur in $S_2O_3^{2-}$ is: