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प्रश्न
True or False – If False give the correct answer
All fuels form flame.
पर्याय
True
False
उत्तर
False
Correct statement: All fuels do not form flame.
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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
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 (zone) |
Column C (colour) |
| (a) hottest part | (iii) outer zone of complete combustion | (x) blue |
| (b) moderately hot | (ii) middle zone of partial combustion | (z) yellow |
| (c) least hot | (i) innermost zone of complete combustion | (y) black |
Write True/False against the following statement and also correct the false statement.
The substances which vaporise during burning, give flame.
Which is the luminous part of the flame?
Write a note on flame.
Why is the candle flame straight?
