🔍 Key Concepts

• Ethylene oxide structure (a three‑member ring with one oxygen and two carbons) • Difference between oxides, alcohols, esters, and ethers • How names like "ethylene" and "glycol" relate to their chemical families

💭 Think About

• Look at the word parts: what does the ending "‑oxide" usually indicate compared to "‑ol" or "ester"? • Which family name best matches a small ring compound formed by adding an oxygen across a carbon–carbon double bond? • If ethylene glycol is a diol (two alcohol groups), what would you call the compound that is like a cyclic oxide of ethylene instead?

✅ Before You Answer

• Verify which option refers to cyclic ethers formed from alkenes (like ethylene) • Eliminate any families that are clearly associated with –OH (hydroxyl) groups, since ethylene oxide does not have a free –OH group • Confirm that esters and glycol ethers typically have different functional groups than a simple three‑member ring with one oxygen atom