Which of the following represents the most oxidized form of hydrocarbon?

In the reaction $H_2S + Cl_2 \to S + 2HCl$,which species undergoes oxidation?

In which of the following reactions is there a change in the oxidation number of the nitrogen atom?

Observe the following reactions:
$I$. $2H_2O_{(l)} + 2Na_{(s)} \rightarrow 2NaOH_{(aq)} + H_{2(g)}$
$II$. $2H_2O_{(l)} + 2F_{2(g)} \rightarrow 4H^{+}_{(aq)} + 4F^{-}_{(aq)} + O_{2(g)}$
Identify the correct statement from the following:

In the reaction $3Mg + N_2 \to Mg_3N_2$,which of the following is correct?

When $Fe^{2+}$ changes to $Fe^{3+}$ in a reaction,