Redox Reactions

In the reaction \( \mathrm{Zn} + \mathrm{CuSO_4} \rightarrow \mathrm{ZnSO_4} + \mathrm{Cu} \), which species is oxidized?

What is the oxidation state of sulfur in \( \mathrm{H_2SO_4} \)?

Which of the following is a redox reaction?

In the reaction \( \mathrm{Fe^{3+} + Fe^{2+} \rightarrow Fe^{2+} + Fe^{3+}} \), identify the oxidizing agent.

Balance the redox reaction in acidic medium: \( \mathrm{MnO_4^- + Fe^{2+} \rightarrow Mn^{2+} + Fe^{3+}} \). What is the coefficient of \( \mathrm{Fe^{2+}} \) after balancing?

Which of the following statements is true for a redox reaction?

In the reaction \( \mathrm{2Cr^{3+} + 3ClO^- \rightarrow 2CrO_4^{2-} + 3Cl^-} \) in basic medium, what is the oxidation state change of chromium?

Calculate the oxidation number of nitrogen in \( \mathrm{NO_2^-} \) ion.

Which of the following pairs can act as a redox couple?

In the electrochemical cell, the electrode where reduction occurs is called: