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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.
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संबंधित प्रश्न
Abida and Ramesh were doing an experiment in which water was to be heated in a beaker. Abida kept the beaker near the wick in the yellow part of the candle flame. Ramesh kept the beaker in the outermost part of the flame. Whose water will get heated in a shorter time?
Which is the hottest part in the flame of candle ______.
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.
Write True/False against the following statement and also correct the false statement.
The substances which vapourise during burning, give flame.
Match the following:
| 1. | White flame | a. | Table salt |
| 2. | Indigo flame | b. | Bleaching powder |
| 3. | Blue flame | c. | Potassium chloride |
| 4. | Orange flame | d. | Epsom salt |
Name a few substances which produce flames on burning.
