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प्रश्न
True or False – If False give the correct answer
All fuels form flame.
विकल्प
True
False
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उत्तर
False
Correct statement: All fuels do not form flame.
APPEARS IN
संबंधित प्रश्न
Inner zone of flame : :______, outer zone of flame : :______
Name the unit in which the calorific value of a fuel is expressed?
If 4.5kg of fuel is completely burnt and amount of heat produced stands measured at 1, 80,000 KJ what is the calorific value.
Picture based question
Arul and Aakash were doing an experiment in which water was to be heated in a beaker. Arul kept the beaker near the wick in the yellow part of candle flame. Aakash kept the beaker in the outer most part to the flame. Whose water will get heated in a shorter time?
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The ______ temperature at which a substance catches fire is called its ______ temperature.
The substances which gave very ______ ignition temperature and can easily catch fire with a flame are called ______ substances.
Anu wants to boil water quickly in a test tube. On observing the different zones of the flame, she is not able to decide which zone of the flame will be best for boiling water quickly. Help her in this activity.
Substances which vapourise during burning produce ______.
Explain the structure of a candle flame.
