__________ gas is emitted when coal is combusted in the absence of Oxygen?
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Answer: D. Carbon Monoxide
Explanation
Combusting coal in a restricted oxygen environment prevents complete chemical oxidation reactions. This incomplete combustion process generates large quantities of toxic carbon monoxide gas. Option D correctly names this hazardous byproduct released during oxygen-starved burning. Carbon monoxide is a colorless, odorless, and highly poisonous gas dangerous to living organisms. Chemical formulas distinguish carbon dioxide with two oxygen atoms from carbon monoxide with one. Industrial safety protocols mandate strict ventilation monitoring wherever fossil fuels are burned.
Faulty heating appliances can produce lethal carbon monoxide indoors without warning occupants. Environmental scientists monitor combustion emissions to reduce air pollution and protect public health. Understanding chemical reactions helps engineers design safer furnaces and internal combustion engines. Option A carbon dioxide forms during complete combustion when abundant oxygen is present. Option B methane is a primary component of natural gas rather than a coal combustion product. Option C ethene is a hydrocarbon gas commonly used as a plant hormone and chemical feedstock.
- Subject
- Everyday Science
- Category
- Everyday Science
- Topic
- —
- Difficulty
- medium
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