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Question

The outermost region of a flame is the hottest because of ______.

A
complete burning
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B
incomplete burning
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C
insulation
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D
partial burning
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Solution

The correct option is A complete burning
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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