Question

Which step in naming unsaturated hydrocarbons is used for alkenes but not alkynes?

a. Identify the longest chain of carbon atoms.
b. Examine the multiple bond for cis- and trans- isomers.
c. Number the chain of carbons, starting with the end nearest the multiple bond.
d. Add a number prefix indicating the first carbon atom in the multiple bond.

Answer 1

B .........................

Answer 2

The answer is B. Unsaturated hydrocarbons will be hydrocarbons that have twofold or triple covalent securities between neighboring carbon particles. Those with no less than one carbon-to-carbon twofold bond are called alkenes and those with no less than one carbon-to-carbon triple bond are called alkynes.