Which is a redox reaction?
- A
CO₂ + H₂O → H₂CO₃
- B
NaCl + AgNO₃ → AgCl + NaNO₃
- C
HCl + NaOH → NaCl + H₂O
- Dcheck_circle
Mg + 2 HCl → MgCl₂ + H₂
Explanation
Mg goes from 0 to +2 (oxidation); H goes from +1 to 0 (reduction). Others are precipitation, neutralization, or addition — no oxidation-state change.