Sub-topic 1
2025 · National One-Eighth
Free
Composition of crude petroleum and natural gas, and fractional distillation (true/false)
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Sub-topic 2
2026 · National Preliminary
Premium
Composition of crude petroleum and natural gas, and fractional distillation (true/false)
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Sub-topic 3
2013 · National Preliminary
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Riddle: petrol as a fractional-distillation cut of crude oil
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Sub-topic 4
2013 · National Preliminary
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Problem of the day: fractional distillation of a two-solvent mixture
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Sub-topic 5
2013 · National Preliminary
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Kerosene and aviation fuel come from similar/overlapping crude-oil fractions (true/false)
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Sub-topic 6
2013 · National Preliminary
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Reforming converts straight-chain alkanes to branched/aromatic products (true/false)
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Sub-topic 7
2013 · National Preliminary
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Branched hydrocarbons burn more smoothly (higher octane) than straight-chain isomers (true/false)
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Sub-topic 8
2017 · National Semifinal
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The octane rating scale and its n-heptane/iso-octane reference compounds
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Sub-topic 9
2017 · National Semifinal
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Catalytic cracking of long-chain hydrocarbons to smaller molecules
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Sub-topic 10
2017 · National Semifinal
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Reforming to raise octane number via branching, alkenes and aromatics
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Sub-topic 11
2019 · National Preliminary
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Nitroglycerin as the active explosive component of dynamite
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Sub-topic 12
2020 · National One-Eighth
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Nitroglycerin as the active chemical in dynamite
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Sub-topic 13
2020 · National One-Eighth
Premium
Alfred bernhard nobel as the inventor of dynamite
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