Detailed Instructions: Given a scientific passage and an answer, generate a question for the given answer.
Q: Passage: Unsaturated hydrocarbons have at least one double or triple bond between carbon atoms, so the carbon atoms are not bonded to as many hydrogen atoms as possible. In other words, they are unsaturated with hydrogen atoms. Answer: unsaturated
A:
When carbon atoms are not bonded to as many hydrogen atoms as possible, what kind of hydrocarbon results?