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प्रश्न
Make labeled diagram of a candle flame.
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उत्तर
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संबंधित प्रश्न
True or False – If False give the correct answer
All fuels form flame.
Name the unit in which the calorific value of a fuel is expressed?
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.
Match the following for the flame of a candle.
| Column A |
Column B |
Column C |
| (a) hottest part | (i) innermost zone of unburnt wax vapours | (x) blue |
| (b) moderately hot | (ii) middle zone of partial combustion | (y) black |
| (c) least hot | (iii) outer zone of complete combustion | (z) yellow |
Write True/False against the following statement and also correct the false statement.
Middle zone is the hottest zone of a flame.
Write True/False against the following statement and also correct the false statement.
The substances which vapourise during burning, give flame.
Substances which vapourise during burning produce ______.
Explain the structure of a candle flame.
Why is the candle flame straight?
