Question

Name the zone of candle flame having:
(i) Highest temperature.
(ii) Lowest temperature.
Give reasons also.



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Answer 1

Explanation:

Candles produce light by releasing heat. A candle flame consists of three zones. Each zone has different temperatures and colors.

The first zone is called the outer zone

The second zone is called the middle zone. 

The third zone is called the Inner zone

The outer zone is blue in color, due to complete combustion. This zone is the hottest zone.

The middle one is in yellow color, which is the bright part of the flame. It is moderately hot and partial combustion of fuel takes place.

The least hot region of the flame is innermost zone. This inner zone is black in color due to the presence of unburnt wax vapors.

Answer 2

Answer:

Answer :-

1. Highest temperature :- The outer core of the candle flame is light blue -- 1670 K (1400 °C). That is the hottest part of the flame.

• Reason :-The outer zone of a flame is blue:It is a non-luminous zone.In this zone,complete combustion of the fuel takes place because there is plenty of air around it. 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.

1. Lowest zone :- innermost zone
2. innermost zoneThe least hot region (800 degree celsius) of the flame is the innermost zone. This inner zone is black in color due to the presence of unburnt wax vapors.

• Reason :- The innermost zone of candle flame which has unburnt wax vapours has the least temperature. The outermost zone of the flame where complete combustion occurs has the highest temperature.