Redox Reactions

In the reaction $2H_{2} + O_{2} \rightarrow 2H_{2}O$, what is being oxidized?

Which species is reduced in the reaction $2Fe^{3+} + 2e^{-} \rightarrow 2Fe^{2+}$?

In a redox reaction, what does the term 'oxidation' refer to?

Identify the reducing agent in the reaction $Zn + 2HCl \rightarrow ZnCl_{2} + H_{2}$.

What is the oxidation state of sulfur in $ext{H}_{2} ext{SO}_{4}$?

In the reaction $2MnO_{4}^{-} + 5C_{2}O_{4}^{2-} \rightarrow 2Mn^{2+} + 10CO_{2} + 8H_{2}O$, what is being reduced?

What type of reaction is $2Na + Cl_{2} \rightarrow 2NaCl$?

In the context of redox reactions, what does the term 'reduction' mean?

In the half-reaction $Cu^{2+} + 2e^{-} \rightarrow Cu$, what is happening to copper?