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Which of these reactions are redox reactions? Check all that apply. Cd HCl → CdCl2 H2 CuCl2 Na2S → 2NaCl CuS CaCO3 → CaO CO2 2ZnS 3O2 → 2ZnO 2SO2 CH4 2O2 → CO2 2H2O.

Respuesta :

Cd + 2HCl → CdCl₂ + H₂, 2ZnS + 3O₂ → 2ZnO + 2SO₂ and CH₄ + 2O₂ → CO₂ + 2H₂O reactions are redox reaction.

What is redox reaction?

Redox reactions are those reactions in which oxidation and reduction process takes place simultaneously.

  • Cd + 2HCl → CdCl₂ + H₂

Above balanced equation is a redox reaction as in this reaction oxidation of Cadmium takes place from 0 to+2 state and reduction of hydrogen takes place from +1 to 0 state.

  • CuCl₂ + Na₂S → 2NaCl + CuS
  • CaCO₃ → CaO + CO₂

Above two balanced reaction are not the redox reaction as their is no oxidation or reduction takes place.

  • 2ZnS + 3O₂ → 2ZnO + 2SO₂

Above balanced equation is a redox reaction as in this reaction oxidation of sulfur takes place from -2 to+4 state and reduction of oxygen takes place from 0 to -2 state.

  • CH₄ + 2O₂ → CO₂ + 2H₂O

Above balanced equation is a redox reaction as in this reaction oxidation of carbon takes place from -4 to+4 state and reduction of oxygen takes place from 0 to -2 state.

Hence, Cd + 2HCl → CdCl₂ + H₂, 2ZnS + 3O₂ → 2ZnO + 2SO₂ and CH₄ + 2O₂ → CO₂ + 2H₂O reactions are redox reaction

To know more about redox reaction, visit the below link:

https://brainly.com/question/26263317

Answer:

1,4,5

Explanation:

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