Why is the outermost zone of candle flame non luminous but the middle is luminous
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student-name Shreya Mahajan asked in Science
What is the difference between luminous and non- luminous zones and what is the difference between inflammable and flammable substances ?
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student-name Jyoti Pant answered this
9416 helpful votes in Science, Class XII-Science
The innermost zone of a candle flame is the dark zone, the middle zone is the luminous zone and the outermost zone is the non-luminous zone.
Luminous Zone:
This zone is bright yellow. There is still insufficient oxygen for complete burning so pyrolysis continues and larger carbon
particles are produced.The temperature is around 1,200°C.
Non-Luminous Zone:
In this zone,fuel on the wick evaporates. There is insufficient oxygen for fuel to burn. Temperature is about 600°C near the
wick.
Flammable substances and inflammable substances are basically imply the same meaning. The substances which have very low ignition temperature are called inflammable substances. These substances catch fire very easily. LPG, petrol, and alcohol are some examples of inflammable substances.
student-name Shreya Mahajan asked in Science
What is the difference between luminous and non- luminous zones and what is the difference between inflammable and flammable substances ?
SHARE 0 Follow 0
student-name Jyoti Pant answered this
9416 helpful votes in Science, Class XII-Science
The innermost zone of a candle flame is the dark zone, the middle zone is the luminous zone and the outermost zone is the non-luminous zone.
Luminous Zone:
This zone is bright yellow. There is still insufficient oxygen for complete burning so pyrolysis continues and larger carbon
particles are produced.The temperature is around 1,200°C.
Non-Luminous Zone:
In this zone,fuel on the wick evaporates. There is insufficient oxygen for fuel to burn. Temperature is about 600°C near the
wick.
Flammable substances and inflammable substances are basically imply the same meaning. The substances which have very low ignition temperature are called inflammable substances. These substances catch fire very easily. LPG, petrol, and alcohol are some examples of inflammable substances.
ekta08:
I was not knowing but for ur help I had taken it frm anywhere
Hope it will help u
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