Final answer:
The addition of heat and acid to 2-oxocyclopentanecarboxylic acid typically results in decarboxylation, producing cyclopentanone as the product.
Step-by-step explanation:
The addition of heat and acid to 2-oxocyclopentanecarboxylic acid results in a decarboxylation reaction where the carboxylic acid group (-COOH) is removed and carbon dioxide (CO2) is released. This process transforms 2-oxocyclopentanecarboxylic acid into cyclopentanone. It does not result in the formation of the other options listed like cyclopentene, cyclopentanol, cyclopentaldehyde, or cyclopentanecarboxylic acid. The parent name for the compound is cyclopentane, and upon losing the carboxylic acid group, which is -COOH, and retaining the ketone group, which is =O, the most appropriate answer would be cyclopentanone (E).