Which Molecule Contains a Double Bond

question 30

Multiple Choice

Which molecule contains a double bond?

• A) HCN
• B) H₂S
• C) C₂H₂
• D) C₂H₆
• E) O₂

---

Definitions:

Nerve Cord

Bundle of nerves that runs the length of a body.

Adult Tunicates

Marine invertebrates that, during their adult stage, are fixed in place and have a sac-like body covered by a tunic.

Anatomically Modern Humans

Homo sapiens exhibiting physical characteristics similar to those of human populations today, dating back approximately 200,000 years ago.

East Africa

A region of Africa that includes countries like Kenya, Tanzania, Uganda, Rwanda, and Burundi, known for its diverse ecosystems and rich cultural heritage.