A flame is a region where combustion of fuel takes place.
Substances which vapourise during burning produce flames. E.g. kerosene, wax etc. Substances which do not vapourise during burning do not produce flames. E.g. coal, charcoal etc. The colour of flame depends on: Temperature, amount of air available, nature of the substance burning.
Luminous Flame |
Non Luminous Flame |
1. Give yellow flame |
1. Give blue color flame |
2. Emits lot of light |
2. Emit very little light |
3. Observed when there is insufficient oxygen or incomplete combustion |
3. Observed when there is sufficient amount oxygen available |
4. Temperature is less and leaves behind black soot and other residue. |
4. Leave no residues behind |
Wood and charcoal are substances that do not vaporise, but still burn,___________. | |||
Right Option : C | |||
View Explanation |
Non luminous flame undergoes _____________________ combustion. | |||
Right Option : A | |||
View Explanation |
Non Luminous flame leaves _________ residue behind.
| |||
Right Option : D | |||
View Explanation |
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A marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
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