Question

In the chemical reaction: zn(s) + cu2+(aq) → zn2+(aq) + cu(s),

Answer 1

Zn⁰(s) + Cu²⁺(aq) → Zn²⁺(aq) + Cu⁰(s),

Zn⁰(s) ------> Zn²⁺(aq)  + 2e⁻
As we can see Zn(s) lost 2 electrons and became Zn²⁺ ion.
So, Zn was oxidized.
Correct answer is 1) Zn(s).