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Combustion and Flame — Science STD 8 — Question

Gujarat BoardEnglish MediumSTD 8ScienceCombustion and Flame1 Mark
MCQ
Why is it never advised to sleep in a room with burning coal fire?
  • ✓
    Incomplete combustion of coal produces carbon monoxide, which is poisonous.
  • B
    Incomplete combustion of coal produces carbon dioxide, which is poisonous.
  • C
    Burning of coal produces oxides of nitrogen, the fumes of which are very toxic.
  • D
    Burning of coal produces oxides of nitrogen that combine with moisture present in air to form acids.
✓

Answer

Correct option: A.
Incomplete combustion of coal produces carbon monoxide, which is poisonous.
Incomplete combustion of fuels such as coal produces carbon monoxide $(CO)$ gas. Carbon monoxide is a poisonous gas and can even result in death, if inhaled in large quantities. Hence, it is dangerous to burn coal in a closed room while sleeping.

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