Which of these represents a redox reaction?

Chemistry JAMB 1986

Which of these represents a redox reaction?

  • AgNO3 + NaCl → AgCAl + NaNO3
  • H2S + Pb(NO3) → PbS + 2HNO3
  • CaCO3 → CaO + CO2
  • Zn + 2HCl → ZnCl2 + H2 checkmark

The correct answer is: D

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