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प्रश्न
The substances which gave very ______ ignition temperature and can easily catch fire with a flame are called ______ substances.
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उत्तर
The substances which gave very low ignition temperature and can easily catch fire with a flame are called inflammable substances.
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संबंधित प्रश्न
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Make labeled diagram of a candle flame.
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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.
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| 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 |
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The substances which vapourise during burning, give flame.
Substances which vapourise during burning produce ______.
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| 1. | Inner zone | a. | Yellow |
| 2. | Outer zone | b. | Borax powder |
| 3. | Middle zone | c. | Blue |
| 4. | Green flame | d. | Black |
Why is the candle flame straight?
