Answer: F2.
- A Cl2
- B F2
- C Br2
- D I2
Correct answer: B. F2
Explanation: Fluorine has the highest standard reduction potential among the halogens, making F2 the strongest oxidising agent.
Electron transfer in a redox reaction: zinc loses electrons (oxidised, acts as reducing agent) and copper(II) ions gain those same electrons (reduced, acts as oxidising agent).
Concept context
Master electron transfer in chemistry: assign oxidation states, balance half-reactions, identify oxidising and reducing agents, and connect redox to everyday reactions.