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प्रश्न
True or False – If False give the correct answer
All fuels form flame.
विकल्प
True
False
उत्तर
False
Correct statement: All fuels do not form flame.
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संबंधित प्रश्न
Make a labelled diagram of a candle flame.
Name the unit in which the calorific value of a fuel is expressed?
Magnesium ribbon on burning in air produces
The ______ temperature at which a substance catches fire is called its ______ temperature.
The substances which gave very ______ ignition temperature and can easily catch fire with a flame are called ______ substances.
If you hold a piece of iron wire with a pair of tongs inside a candle flame or a Bunsen burner flame, what will you observe? Will it produce 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.
