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Standard VIII
Chemistry
Question

The hottest part of a candle flame is the __________.
  1. dark zone
  2. luminous zone
  3. hot zone
  4. non-luminous zone

A
dark zone
B
hot zone
C
non-luminous zone
D
luminous zone
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Solution
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The Non-Luminous zone is the region of the complete combustion. If you look at a candle flame closely. You will see an "aura" formed around the candle. Since this zone is complete combustion and it is the hottest part of the flame.

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