Question

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Is combustion an oxidation or a reduction process?

Answer 1

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Combustion is an oxidation process. Hydrocarbons gets oxidized in presence of oxygen to produce carbon dioxide and water.
<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> ${\text{CH}}_4$ + ${\text{2O}}_2$ → ${\text{CO}}_2$ +${\text{2H}}_2$$\text{O}$
In above reaction, ${\text{CH}}_4$ oxidized to ${\text{CO}}_2$ in presence of oxygen.