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Combustion And ...

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  • Question 1
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    Directions For Questions

    Read the statements given below and select the correct option.

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    Statement 1: Combustion is a chemical process in which a substance reacts with oxygen to give out heat and light.
    Statement 2: Heat and light are produced in the sun due to combustion.

  • Question 2
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    Which of the following options correctly defines calorific value of a fuel?

  • Question 3
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    Analyse the two statements given below and select the correct option.

    Statement I: Fuel are energy reserves and this energy is released by the process of combustion.
    Statement II: Combustion is the process of burning the substance in the presence of a sufficient quantity of oxygen.

  • Question 4
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    Which of the following options regarding burning of coal is correct?

  • Question 5
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    Combustion of fuels is

  • Question 6
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    In which of the following cases is the use of water as a fire extinguisher inappropriate?

    I. In an electrical appliance shop
    II. In a newspaper factory
    III. In a furniture house

  • Question 7
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    What happens when water is heated in a paper cup?

  • Question 8
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    Water is used to extinguish fire because it

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