Ethanol, blended in petrol, is made mainly by:
- Afermenting sugars from sugarcane and grain
- Bgasifying coal at high temperature
- Csplitting water by electrolysis
- Ddistilling crude oil in refineries
Show answer and explanation
Correct answer: (a) fermenting sugars from sugarcane and grain
Explanation
Ethanol (ethyl alcohol) comes from fermenting sugars with yeast, or from ethylene hydration. India reached 20% blending in 2025.