Gasoline is distilled commercially within which temperature range__________________?
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Answer: B. 65 – 220°C
Explanation
Commercial gasoline is a petroleum fraction that distills within the approximate boiling temperature range of 65°C to 220°C. Fractional distillation separates crude oil components based on their varying boiling point ranges in massive refinery columns. Lighter hydrocarbon fractions distill off at lower temperatures, while heavier diesel and lubricating oils require much higher heat. Crude petroleum is a complex mixture of hydrocarbons that must be refined into usable commercial fuels through fractional distillation. Gasoline consists primarily of branched alkanes, cycloalkanes, and aromatic hydrocarbons containing between four and twelve carbon atoms. Refineries blend various distillation fractions to achieve desired octane ratings, vapor pressures, and seasonal volatility standards.
Option A (30-65°C) represents lighter petroleum ether or pentane fractions rather than finished commercial gasoline blends. Option C (220-350°C) corresponds to heavier kerosene and diesel fuel fractions rather than gasoline boiling ranges. Options D and E are incorrect because higher distillation temperatures yield heavy fuel oils and bitumen, not gasoline.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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