Practice!

Sample Problem

Which of the following chemical formulas are acyclic alkynes?

C2H2

C2H4

C2H6

C3H6

C3H4

Solution

Alkynes are hydrocarbons that contain triple bonds. The general chemical formula for acyclic alkynes is CxH2x-2. Therefore C2H2 and C3H4 are examples of alkynes.