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प्रश्न
Name the substance added to petrol to increase the efficiency of the engine.
संक्षेप में उत्तर
उत्तर
Tetraethyl lead (TEL) is a chemical added to petrol to improve engine efficiency. However, because of its negative environmental and health impacts, it has been mostly phased out and replaced with safer alternatives such as ethanol or other oxygenates (e.g., MTBE - Methyl Tertiary Butyl Ether) in unleaded gasoline to improve engine efficiency and reduce emissions.
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