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Combustion and ...

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  • Question 1
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    A substance which burn in air is  __________ (combustible/ non-combustible) substance such as ____________ (hydrogen/ ammonia/ chlorine).

  • Question 2
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    Stack heat losses can be minimized by ____________.

  • Question 3
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    The products of a burning candle are:

  • Question 4
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    A thin paper cup filled with water does not catch fire when placed over a flame. This is because:

  • Question 5
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    While cooking, if the bottom of the vessel is getting blackened on the outside, it means that __________.

  • Question 6
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    Which of the following statements gives the correct distinction between the burning of carbon compounds and respiration?

  • Question 7
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    The different zones of a candle flame are marked by the letters, A, B and C. Which of the following is correct?

  • Question 8
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    The essential requirements for producing a fire ___________.

  • Question 9
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    Charcoal burn to produce heat, light and:

  • Question 10
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    Which of the following is combustible?

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