i. The outermost zone of flame is known as its non-luminous zone.
Why ?
ii. The middle zone of the flame is hotter than the dark inner zone .
Why?
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Answer:
There are several "zones" within a non-luminous flame, and each zone has a different temperature. The outermost zone of the flame is blue in colour and it is the hottest part. This is due to complete combustion. The middle zone is moderately hot and is yellow in colour.
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Answer:
The middle zone of a flame is yellow:It is bright and luminous. The fuel vapours burn partially in the middle zone because there is not enough air of burning in this zone. ... The outermost zone has the highest temperature in the flame.It is the hottest part of the flame.It is quite thin as compared to middle zone.
Explanation:
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