Redox Reactions

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

Identify the oxidizing agent in the reaction: \( \mathrm{2Fe^{2+} + Cl_2 \rightarrow 2Fe^{3+} + 2Cl^-} \).

Which of the following is a correct redox reaction?

In the reaction \( \mathrm{MnO_4^- + 8H^+ + 5Fe^{2+} \rightarrow Mn^{2+} + 5Fe^{3+} + 4H_2O} \), what is the change in oxidation state of manganese?

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

Calculate the oxidation number of sulfur in \( \mathrm{Na_2SO_3} \).

In the reaction \( \mathrm{2Cr^{3+} + 3H_2O_2 \rightarrow 2Cr^{6+} + 3H_2O} \), what is the role of \( \mathrm{H_2O_2} \)?

Which of the following statements is TRUE for redox reactions?

In the electrochemical series, which metal will displace \( \mathrm{Zn} \) from its salt solution?

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?