Flame
Flame
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.
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Luminous Flame |
Non Luminous Flame |
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1. Give yellow flame |
1. Give blue color flame |
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2. Emits lot of light |
2. Emit very little light |
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3. Observed when there is insufficient oxygen or incomplete combustion |
3. Observed when there is sufficient amount oxygen available |
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4. Temperature is less and leaves behind black soot and other residue. |
4. Leave no residues behind |
The blue zone in a LPG flame indicates __________________________.
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| Right Option : D | |||
| View Explanation | |||
Which of the following statements is/are correct? 1) The flame of a Bunsen burner is blue when the air hole is open and yellow when the air hole is closed. 2) The liquid or solid wax never catches fire. 3) A substance cannot catch fire if its temperature is higher than its ignition temperature. 4) Water should be poured over burning petrol,kerosene or diesel. 5) The middle zone of a candle emits the leaser light. | |||
| Right Option : A | |||
| View Explanation | |||
Flame that gives blue colour to the flame is called as _____________________. | |||
| Right Option : B | |||
| View Explanation | |||
Students / Parents Reviews [10]
My experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
Ayan Ghosh
8thAbout Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
Shreya Shrivastava
8thOne of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
Aman Kumar Shrivastava
10thIt was good as the experience because as we had come here we had been improved in a such envirnment created here.Extra is taught which is beneficial for future.
Eshan Arora
8thI have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
10thA 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.
Archit Segal
7thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
Manish Kumar
10thAbhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
Om Umang
10thIt was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
Cheshta
10thIt has a great methodology. Students here can get analysis to their test quickly.We can learn easily through PPTs and the testing methods are good. We know that where we have to practice
