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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?
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उत्तर
The water in Ramesh's beaker will heat up faster because he placed the beaker on the outermost part of the flame, which is the hottest part of the flame.
Abida placed it near the yellow part of the flame, which is less hot than the blue flame. Therefore, the water in Ramesh's beaker will heat up faster than the water in Abida's beaker.
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संबंधित प्रश्न
Make a labelled diagram of a candle flame.
Inner zone of flame : :______, outer zone of flame : :______
The substance that does not burn with flame is ______.
The substances which vaporise during ______ give flame.
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 |
Substances which vapourise during burning produce ______.
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.
Why is the candle flame straight?
