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LAKHMIR SINGH & MANJIT KAUR-COMBUSTION AND FLAME-EXERCISES
- Explain how , the use of CNG in automobiles has reduced pollution in c...
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- What are the disadvantages of burning wood as fuel ?
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- Give reasons for the following : LPG is a better domestic fuel than wo...
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- Explain why , when a burning candle is covered with an inverted gas ja...
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- It is difficult to burn a heap of green leaves but dry leaves catch fi...
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- What are the combustible substances ?
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- Name three combustible substances .
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- What are non-combustion substances ?
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- Name three non-combustion substances.
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- What is meant by 'combustion' ? Explain with an example.
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- What are the conditions necessary for combustion to take place ?
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- Make a labelled diagram of a candle flame.
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- What makes the middle zone of a candle flame luminous (or light-giving...
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- What is global warming?
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- Name the gase whose increasing percentage in air in leading to global ...
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- State a harmful effect which can be caused by global warming.
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- Explain how, burning of fuels such as coal, petrol and diesel leads to...
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- Which of the following substances has the lowest ignition temperature ...
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- One of the following is not a combustible substance. This one is :
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- Which of the following is not used in making matchsticks these days ?
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