Advertisements
Advertisements
प्रश्न
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?
Advertisements
उत्तर
Iron wire will become red hot and glow. It will not produce a flame.
APPEARS IN
संबंधित प्रश्न
If 4.5kg of fuel is completely burnt and amount of heat produced stands measured at 1, 80,000 KJ what is the calorific value.
Magnesium ribbon on burning in air produces
The substance that does not burn with flame is ______.
On placing an inverted tumbler over a burning candle, the flame extinguishes after some time. This is because of non-availability of
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.
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.
