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Does all combustible substances give out...

Does all combustible substances give out a flame while burning?

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The chemical process in which a suubstance reacts with oxygen to give off heat is called combustion. The substances which vapourize during burning give flames. For example, combustion of kerosene oil produces flame. On the other hand, certain substances like coal do not vaporize, and hence does not produce a flame.
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Coal does not give out a flame while burning. Why?

A substance which reacts with oxygen giving heat is called a combustible substance. Which, one of the following is a combustible substance?

Knowledge Check

  • The compound gives a sooty flame on burning.

    A
    `CH_(4)`
    B
    `C_(3)H_(8)`
    C
    `C _(2) H _(6)`
    D
    `C_(2) H _(4)`

  • The compound gives a sooty flame on burning .

    A
    `CH_(4)`
    B
    `C_(3)H_(3)`
    C
    `C_(2)H_(6) `
    D
    `C_(2)H_(4)`

  • Which substance give heat and light after combustion?

    A
    Flame
    B
    Fuel
    C
    Combustion
    D
    None of these

    • Similar Questions

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    Why some substances burn with a flame while as some burn without a flame?

    A combustible substance cannot catch fire or burn as long as its temperature is lower than its ignition temperature. Explain with examples.

    What type of substances, on burning, give a flame ?

    The coal does not vaporise on heating hence, it does not give out a ____ while burning.

    The minimum temperature at which a combustible substance starts burning si called its _____ temperature.

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