Advertisements
Advertisements
प्रश्न
On placing an inverted tumbler over a burning candle, the flame extinguishes after some time. This is because of non-availability of
विकल्प
oxygen
water vapours
carbon dioxide
wax
Advertisements
उत्तर
oxygen
Explanation:
The flame extinguishes because of non-availability of oxygen. Air or oxygen is necessary for combustion.
APPEARS IN
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?
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 ______.
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?
Write True/False against the following statement and also correct the false statement.
Middle zone is the hottest zone of a flame.
You are provided with three watch glasses containing milk, petrol and mustard oil respectively. Suppose you bring a burning candle near these materials one by one, which material(s) will catch fire instantly and why?
Which is the luminous part of the flame?
Match the following:
| 1. | Inner zone | a. | Yellow |
| 2. | Outer zone | b. | Borax powder |
| 3. | Middle zone | c. | Blue |
| 4. | Green flame | d. | Black |
Explain the structure of a candle flame.
