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Combustion and ...

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  • Question 1
    1 / -0

    A material when burnt gives out flame because of _________.

  • Question 2
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    The colour of the flame in luminous zone is:

  • Question 3
    1 / -0

    A circular blackish ring on the glass plate kept over the candle flame indicates ___________.

  • Question 4
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    Fire is extinguished by __________.

  • Question 5
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    The blue zone in a LPG flame indicates _________.

  • Question 6
    1 / -0

    Choose the correct statement among the following.

  • Question 7
    1 / -0

    Which is the hottest part of Bunsen flame?

  • Question 8
    1 / -0

    Coal, petroleum, natural gas and propane are fossil fuels. They are called fossil fuels because ________.

  • Question 9
    1 / -0

    Match Column I with Column II and select the correct option from the codes given below.

    Column IColumn II
    (a)Hottest zone of a candle flame(i)Zone of unburnt wax vapours
    (b)Yellow zone of a candle flame(ii)Non-luminous zone
    (c)Black innermost zone of the candle flame(iii)Incomplete combustion zone

  • Question 10
    1 / -0

    The combustion in which a material bursts into flames without the application of heat is known as :

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