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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?
उत्तर
The water in Ramesh's beaker will heat up faster because he placed the beaker on the outermost part of the flame, which is the hottest part of the flame.
Abida placed it near the yellow part of the flame, which is less hot than the blue flame. Therefore, the water in Ramesh's beaker will heat up faster than the water in Abida's beaker.
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संबंधित प्रश्न
The substance that does not burn with flame is
The substances which vaporise during ______ give flame.
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 |
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.
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?
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 |
Why is the candle flame straight?
