Biodegradable polymers like PLA (Polylactic Acid) are derived from renewable resources such as ________.
- Petroleum
- Corn starch
- Coal
- Natural gas
Answer: Corn starch
PLA is synthesized from lactic acid produced by fermenting corn starch/sugarcane. Degrades to CO₂ and water under composting conditions. Sustainable alternative to conventional plastics. [[NCERT Chemistry Class 12]]