Here's why:
* Cyclic: Cyclohexane is indeed a cyclic hydrocarbon, meaning its carbon atoms form a closed ring.
* Straight Chain: A straight chain structure means the carbon atoms are connected in a single line, with no branches. Cyclohexane's carbon atoms form a ring, not a straight chain.
Structure of Cyclohexane:
Cyclohexane has a ring of six carbon atoms, each connected to two hydrogen atoms. The ring is not flat, but rather adopts a "chair" conformation to minimize strain.