Question

Which zone of candle contains unburnt vapour of wax and very hot carbon particles?

Answer 1

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The non-luminous zone or the most outer zone of the flame is the hottest part of candle and also contain unburnt molten vapour of wax.
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Answer 2

Answer:

The innermost zone of a candle flame will contain unburnt vapour of wax.

Explanation:

• The luminous zone of a candle will contain very hot carbon particles.
• The innermost zone of a candle near the molten wax will contain unburnt wax vapour rising from it due to the heat produced from the candle flame.
• These wax vapours further decompose to carbon particles.
• In the luminous zone of the candle, partial combustion takes place leading to release of heat energy which heats up the carbon particles, which in turn gets hot and yellow and produces the light.