Answer: Loss of electrons.
- A Gain of electrons
- B Loss of electrons
- C Gain of hydrogen
- D Loss of oxygen
Correct answer: B. Loss of electrons
Explanation: Oxidation is the loss of electrons (or increase in oxidation state). The mnemonic OIL RIG: Oxidation Is Loss (of electrons).
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.