Redox processes in displacement reaction Steps:

• Identify the reaction type: single displacement where Zn replaces Cu, indicating a redox process.
• Split into half-reactions: Zn(s) → Zn²⁺(aq) + 2e⁻ (oxidation); Cu²⁺(aq) + 2e⁻ → Cu(s) (reduction).
• Apply definitions: oxidation = loss of electrons; reduction = gain of electrons.
• Evaluate options against half-reactions to find matching statements.

Why D is correct:

• Zn(s) loses 2 electrons to form Zn²⁺(aq), matching the definition of oxidation (LEO: loss of electrons is oxidation).

Why the others are wrong:

• A: Cu(aq) is reduced by gaining electrons, but this describes the copper half-reaction, not the focus on zinc's role.
• B: Oxidation involves losing electrons, not gaining; Cu(aq) is reduced.
• C: Zn(s) is oxidized by losing electrons, not reduced by gaining.

Final answer: D