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Q. Which substance is produced when alcohol is added with petrol and used as a fuel?
Answer: Only carbondioxide
Notes: When alcohol (methanol, ethanol, propanol, and butanol) is mixed with petrol and used as a fuel, it produces carbon dioxide. Adding alcohol enhances the octane contents in the fuel and hence acts as anti-knocking agent.

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📌 Question Number: 77 in Chemistry-15-Hydrocarbons & Fuels in the above course in App.