Question

Explain the zones of flame

Answer 1

$\mathfrak{\large{\underline{\underline{Answer :-}}}}$

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◆ $\textbf{\small{\underline{Dark zone or the innermost zone:}}}$

• The coldest of all the zones, the dark zone is formed just around the wick of the candle flame.

• As the candle is ignited by the matchstick, the melted wax moves up through the cotton wick and vaporises just around the wick creating a dark or a black coloured zone.

• This one is deficient in air and hence a zone where no complete combustion takes place.

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◆ $\textbf{\small{\underline{Luminous zone or the middle zone:}}}$

• The luminous zone is the zone which is moderately hot. .

• This zone lies between the dark zone and the outermost non-luminous zone.

• The zone is yellowish in colour.

• The yellow colour is associated mostly with the burning of a candle.

• Just above it is an orange tinge which is formed as the candle continues to burn.

• With limited oxygen supply to this zone, the wax particles decompose to form carbon particles.

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◆ $\textbf{\small{\underline{Non-luminous zone of the outer zone:}}}$

• This is the hottest zone. The ample presence of oxygen in this zone makes it the zone of complete combustion.

• It looks almost invisible and thus the name, non luminous.

Answer 2

Answer:

a flame has 4zones in it :-

a)the outermost thin faint blush non luminus region of complete combustion . it is the hottest zone of tge flame .

b)the middle bright luminous zone of partial combustion . it is the moderately hot zone .

c)the innermost , coldest dark zone , consists of hot vapour and called as zone of no combustion .

d)blue zone near the bottom of flame is due to burning of carbon monoxide . carbon is formed due to incomplete combustion .

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