The sum of the oxidation numbers of all atoms in the $S_{2}O_{3}^{2-}$ ion is:

What is the oxidation number of Carbon in $K_{2}C_{2}O_{4}$?

In the following reaction,assign the state for the underlined atom in the product of complete hydrolysis at $R.T.$:
$\underline{Cl_2}O + H_2O \longrightarrow 2HClO$

An acidic solution of sodium thiosulfate is unstable because in thiosulfate,the two sulfur atoms have different oxidation states of:

What is the oxidation number of $Li$ in $Li_2O$?

In the conversion $Br_2 \to BrO_3^-$,the oxidation state of bromine changes from