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प्रश्न
Inner zone of flame : :______, outer zone of flame : :______
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उत्तर
Inner zone of flame : : Black, outer zone of flame : : Blue
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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?
The substance that does not burn with flame is ______.
The ______ temperature at which a substance catches fire is called its ______ temperature.
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.
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 |
Match the following:
| 1. | Inner zone | a. | Yellow |
| 2. | Outer zone | b. | Borax powder |
| 3. | Middle zone | c. | Blue |
| 4. | Green flame | d. | Black |
Name a few substances which produce flames on burning.
Explain the structure of a candle flame.
