Combustible Substances Quiz
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Questions and Answers

What is the main difference between the burning of a candle and the burning of coal?

  • Coal burns with a white flame, while a candle burns with a yellow flame.
  • A candle burns with a flame, while coal does not. (correct)
  • A candle burns without producing heat, while coal produces heat.
  • Coal burns faster than a candle.

    • What are some examples of fuels used for running automobiles?

  • Sand, brick, and coal
  • Petrol, diesel, and CNG (correct)
  • Cow dung, wood, and sand
  • Charcoal, sand, and brick

    • Why does charcoal burn in air?

  • Because it produces oxygen
  • Because it reacts with water
  • Because it cools the surroundings
  • Because it is a combustible substance (correct)

    • What is the chemical process of burning known as?

    <p>Combustion</p> Signup and view all the answers

    What does magnesium burn to form when it undergoes combustion?

    <p>Magnesium oxide</p> Signup and view all the answers

    Which substance mentioned can be classified as a combustible substance?

    <p>Coal</p> Signup and view all the answers

    'Combustion' is a process that involves the reaction of a combustible substance with what element?

    <p><em>Oxygen</em></p> Signup and view all the answers

    What is the main difference between the burning of a candle and the burning of coal?

    <p>Candle burns with a flame whereas coal does not.</p> Signup and view all the answers

    What is combustion?

    <p>Combustion is a process that involves the reaction of a combustible substance with oxygen.</p> Signup and view all the answers

    What does charcoal burn to form in air?

    <p>Charcoal burns in air to form carbon dioxide, heat, and light.</p> Signup and view all the answers

    What are some examples of fuels used for running automobiles?

    <p>Fuels like petrol, diesel, compressed natural gas (CNG), coal, wood, and cow dung are used for running automobiles.</p> Signup and view all the answers

    What is a combustible substance?

    <p>A combustible substance is a material that can undergo combustion easily.</p> Signup and view all the answers

    What is the chemical process of burning known as?

    <p>The chemical process of burning is known as combustion.</p> Signup and view all the answers

    What is the result of burning magnesium ribbon?

    <p>Magnesium burns to form magnesium oxide, while producing heat and light.</p> Signup and view all the answers

    What types of flame are produced during the combustion process?

    <p>During combustion, different types of flames can be produced, such as a glow or flameless combustion.</p> Signup and view all the answers

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