S

Shyam Dubey • 3.70K Points
Extraordinary

Q. Which of the following represents a redox reaction?

  • (A) NaOH + HCl → NaCl + H2O
  • (B) Zn + 2HCl → ZnCl2 + H2
  • (C) AgNO3 + NaCl → AgCl + NaNO3
  • (D) BaCl2 + H2SO4 → BaSO4 + 2HCl
  • Correct Answer - Option(B)
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Explanation by: Shyam Dubey
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.

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