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Substances that vaporise during burning typically produce a FLAME, while substances that do not vaporise (like charcoal) burn:
AWith a much larger flame
BOnly in the absence of oxygen
CWithout producing a flame, glowing red instead
DWith a green flame
Answer & Solution
Correct answer: C. Without producing a flame, glowing red instead
Flames come from burning vapours. Wax (candle), kerosene and LPG all vaporise on heating and their vapours burn as a flame. Charcoal does not vaporise — it burns at the surface, glowing red without a flame.
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