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

The compound $YBa_2Cu_3O_7$,which shows superconductivity,has copper in an oxidation state of ........ Assume that the rare earth element Yttrium is in its usual $+3$ oxidation state.

Oxidation number of $N$ in ammonium nitrate is

What are the oxidation states of $S$ in peroxodisulphuric acid and sodium tetrathionate?

What is the oxidation state of $As$ in $H_{3}AsO_{4}$?

The oxidation number of $C$ in $C_6H_{12}O_6$ is: