Q. Which of the following represents a redox reaction?
✅ Correct Answer: (B)
Zn + 2HCl → ZnCl2 + H2
Explanation: In this reaction, zinc is oxidized to Zn2+ and hydrogen ions are reduced to H2 gas — making it a redox reaction. The others involve ion exchange without oxidation or reduction.
Explanation by: Sikhar Chaudhary
In this reaction, zinc is oxidized to Zn2+ and hydrogen ions are reduced to H2 gas — making it a redox reaction. The others involve ion exchange without oxidation or reduction.