Advertisements
Advertisements
Question
The substances which gave very ______ ignition temperature and can easily catch fire with a flame are called ______ substances.
Advertisements
Solution
The substances which gave very low ignition temperature and can easily catch fire with a flame are called inflammable substances.
APPEARS IN
RELATED QUESTIONS
Make a labelled diagram of a candle flame.
Inner zone of flame : :______, outer zone of flame : :______
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.
Make labeled diagram of a candle flame.
Magnesium ribbon on burning in air produces
Anu wants to boil water quickly in a test tube. On observing the different zones of the flame, she is not able to decide which zone of the flame will be best for boiling water quickly. Help her in this activity.
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 |
Match the following:
| 1. | Inner zone | a. | Yellow |
| 2. | Outer zone | b. | Borax powder |
| 3. | Middle zone | c. | Blue |
| 4. | Green flame | d. | Black |
Name a few substances which produce flames on burning.
Why is the candle flame straight?
