The outermost region of the flame have the temperature.

highest

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lowest

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moderate

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Solution

The correct option is A highest
The hotness of a region in a flame depends on the extent of combustion taking place. In a candle flame, the supply of air and hence oxygen to the outer region is maximum. So the burning is complete and the region is therefore the hottest.

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The outermost region of a candle flame has highest temperature because it gets meximum supply of oxygen and the burning is complete.

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