Exercise 1 — IGCSE 0654 Jun 2025 Paper 31 Q8
Show mark scheme

Combustion of alkane: CₙH₂ₙ₊₂ + O₂ → CO₂ + H₂OAddition of H₂ to alkene: CₙH₂ₙ + H₂ → CₙH₂ₙ₊₂ (hydrogenation)Fermentation: C₆H₁₂O₆ → 2C₂H₅OH + 2CO₂ (ethanol production)Esterification: alcohol + carboxylic acid ⇌ ester + water (concentrated H₂SO₄ catalyst)54 Cambridge IGCSE 0654 questions on fuels & petroleum, across all three components.
Every Cambridge IGCSE Co-ordinated Sciences 0654 question on fuels & petroleum (Organic chemistry, Chemistry), across all three exam components. Theory and alternative-to-practical come with full mark schemes; multiple choice is interactive — click an option to check it.





