Question

Which is the zone containing unburnt carbon particles?

Answer 1

Answer:

luminious zone.

Explanation:

The circular dark ring is formed on the slide by deposition of unburnt carbon particles present (middle) luminous zone of the candle.

The copper wire takes the least time to become red hot when introduced into the (outermost) non luminous zone of the flame as this zone has the highest temperature.

Answer 2

The zone containing unburnt carbon particles is the Luminous zone

• There are three distinct zones in the candle flame namely the non-luminous zone, luminous zone and dark zone. The non-luminous zone is the zone where complete combustion takes place, the luminous zone has a limited oxygen supply and is relatively hot and the third zone is the dark zone which is not capable of burning due to the absence of air.

• Luminous zone is the bright and the middle zone of candle flame where the temperature is relatively hot and it does not have an adequate supply of oxygen. The colour of this zone is yellow and the dark circular ring which is formed on the slide is because of the deposition of unburnt carbon particles present in the middle zone which is the luminous zone of the candle.

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