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प्रश्न
The substance that does not burn with flame is ______.
विकल्प
LPG
camphor
dry grass
charcoal
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उत्तर
The substance that does not burn with flame is charcoal.
Explanation:
Charcoal is a solid fuel which does not vaporise on heating. So, charcoal does not burn by producing a flame. It only glows on combustion.
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संबंधित प्रश्न
Make a labelled diagram of a candle flame.
Inner zone of flame : :______, outer zone of flame : :______
Picture based question
Arul and Aakash were doing an experiment in which water was to be heated in a beaker. Arul kept the beaker near the wick in the yellow part of candle flame. Aakash kept the beaker in the outer most part to the flame. Whose water will get heated in a shorter time?
Magnesium ribbon on burning in air produces
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.
The substances which vapourise during burning, give flame.
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 |
Why is the candle flame straight?
