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Charcoal is preferred over wood as a fuel because charcoal:
AIs denser than water under typical conditions
BBurns without smoke and has higher calorific value
CIs cheaper than wood
DSmells better across all cases
Answer & Solution
Correct answer: B. Burns without smoke and has higher calorific value
1. Charcoal is wood that has been heated in limited air to drive off volatiles.
2. The remaining material is mostly elemental carbon.
3. It burns with little smoke because volatile fractions are already gone.
4. Its calorific value (energy per gram) is higher than that of raw wood.
5. So charcoal is preferred for cooking and heating.
_Source: NCERT Class 10 Science Ch 14 'Sources of Energy' (byjus.com extract)_
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