What does PVC make when heated too hot in a plastic process?     a. Esteric acid b. Charcoal c. Polyester d. Hydrochloric Acid

When polyvinyl chloride (PVC) is heated to excessive temperatures, it can lead to a process called thermal degradation. This thermal degradation typically results in the production of various volatile compounds due to the breakdown of PVC's molecular structure. Among the byproducts, hydrochloric acid (HCl) is a significant component formed when PVC is heated too much.

Analysis of Options:

1. Esteric acid: Not a typical byproduct of PVC degradation.
2. Charcoal: Charcoal formation occurs through carbonization, which is not a primary product of PVC breakdown.
3. Polyester: Polyester is a different polymer and not formed from PVC degradation.
4. Hydrochloric Acid: This is a known byproduct of the thermal decomposition of PVC.

Final Answer

The correct answer is d. Hydrochloric Acid.