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    Chemistry
    Grade-10
    Easy

    Question

    Combustion is a reaction in which a substance reacts with

    1. Hydrogen
    2. Nitrogen
    3. Oxygen
    4. Chlorine

    hintHint:

    The process of combustion is a chemical change in which the material reacts with oxygen, releasing energy in the form of light and heat. 

    The correct answer is: Oxygen

      Combustion is a reaction in which a substance combines with oxygen.
      • Combustion, commonly referred to as "burning." is any process in which a substance combines with oxygen to produce heat and light. 
      • Oxygen burns with any other substance to produce carbon dioxide and water as byproducts.
      • These processes are exothermic indicating the release of heat.
      • For example, Combustion of methane [CH4(g) + 2O2(g) → CO2(g) + 2 H2O(g)]

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