Which of the following molecules will experience hydrogen bonding with like molecules?

• A. CH4
• B. NH3
• C. C2H6
• D. CO2

Answer: (B)

Verified step by step guidance

1. Identify the criteria for hydrogen bonding: hydrogen bonding occurs when a hydrogen atom is directly bonded to a highly electronegative atom such as nitrogen (N), oxygen (O), or fluorine (F), and this hydrogen can interact with a lone pair on another electronegative atom in a nearby molecule.
2. Examine each molecule to see if it contains hydrogen atoms bonded to N, O, or F:
3. For CH4 (methane), hydrogen is bonded to carbon, which is not highly electronegative, so it does not exhibit hydrogen bonding.
4. For NH3 (ammonia), hydrogen is bonded to nitrogen, which is highly electronegative and has lone pairs, so NH3 molecules can form hydrogen bonds with each other.
5. For C2H6 (ethane) and CO2 (carbon dioxide), neither has hydrogen atoms bonded to N, O, or F; CO2 has no hydrogen atoms at all, so neither can form hydrogen bonds with like molecules.