8th Class Science Combustion and Flame Question Bank Combustion and Flame

  • question_answer When methane burns in air, what are the products formed?

    A) \[C{{O}_{2}}+2{{H}_{2}}O+heat\]

    B)                        \[C{{O}_{2}}+{{H}_{2}}\]

    C)                        \[CO+{{O}_{2}}\]

    D)                         \[C{{O}_{2}}+{{O}_{2}}+heat\]

    Correct Answer: A

    Solution :

    Fuels and hydrocarbons burn in oxygen and form \[C{{O}_{2}}+2{{O}_{2}}\to C{{O}_{2}}+2{{H}_{2}}O+heat\]and give out heat. \[C{{H}_{4}}+2{{O}_{2}}\to C{{O}_{2}}+2{{H}_{2}}O+heat\]

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