4. a) Give a synonym for an unsaturated hydrocarbon.

b) Give the general formula (such as CxHy) for a hydrocarbon which has a double bond.
c) Give the general formula for a hydrocarbon which has a triple bond.
d) What is the difference between the “cis” and “trans” isomers?

1 answer

a) Alkene
b) CxH2x
c) CxH2x-2
d) Cis-isomers have similar groups on the same side of the double bond, while trans-isomers have similar groups on opposite sides of the double bond.