Zn(s) + CuSO₄(aq) → ZnSO₄(aq) + Cu(s). In the reaction above, the oxidizing agent is

Correct answer: CuSO₄(aq)

Explanation: In the reaction, zinc is oxidized: Zn(s) → Zn²⁺(aq) + 2e⁻. The species that accepts these electrons is Cu²⁺ (from CuSO₄), which is reduced to Cu(s). The oxidizing agent is the electron acceptor, i.e., CuSO₄(aq) (its Cu²⁺ ions).

• CuSO₄(aq) — Correct. Provides Cu²⁺ that is reduced to Cu(s), oxidizing Zn.
• ZnSO₄(aq) — Product after Zn is oxidized; not the oxidizing agent.
• Cu(s) — Reduced product, not the oxidizing agent.
• Zn(s) — The species oxidized (reducing agent), not oxidizing agent.