the ending in "-yne" is used for hydrocarbons with
A. only single bonds
B. at least one double bond
C. at least one triple bond
D. only double and triple bonds
The ending "-yne" in organic chemistry is used to name hydrocarbons that contain at least one triple bond between carbon atoms. Therefore, the correct answer is C. at least one triple bond.
To identify the correct answer, you can use your knowledge of organic chemistry nomenclature. In organic chemistry, hydrocarbons are compounds made up of hydrogen and carbon atoms. The ending of the hydrocarbon's name depends on the type of bond or bonds present between the carbon atoms.
Hydrocarbons with only single bonds between carbon atoms are called alkanes and have the ending "-ane." Examples include methane (CH4), ethane (C2H6), and propane (C3H8).
Hydrocarbons with at least one double bond between carbon atoms are called alkenes and have the ending "-ene." Examples include ethene (C2H4), propene (C3H6), and butene (C4H8).
Hydrocarbons with at least one triple bond between carbon atoms are called alkynes and have the ending "-yne." Examples include ethyne (C2H2), propyne (C3H4), and butyne (C4H6).
Based on this information, we can determine that hydrocarbons with the ending "-yne" have at least one triple bond between carbon atoms, making option C the correct answer.