Question

When naming hydrocarbons, what does the suffix –yne indicate about the structure of the molecule? A.There is a single carbon-bond in the molecule.
B.There is a double carbon-bond in the molecule.
C. There is a triple carbon-bond in the molecule.
D.There are two double carbon-bonds in the molecule.

Answer 1

Answer:

C. There is a triple carbon-bond in the molecule.

Explanation:

Under IUPAC nomenclature system, the hydrocarbons are termed on the basis of number of bonds present between carbon-carbon atoms joining together.

In case of aliphatic hydrocarbons;

The hydrocarbons with single C-C bonds are termed as alkane and all the compounds with such configuration are named with suffix -ane. For example- Methane( $CH_{4}$ )

The hydrocarbons with double C=C bonds are termed as alkene and all the compounds with such configuration are named with suffix -ene. For example- Ethene ( $C_{2}H_{4}$  )

The hydrocarbons with triple C≡C bonds are termed as alkyne and all the compounds with such configuration are named with suffix -yne. For example- Ethyne ( $C_{2}H_{2}$  )

Hence, the hydrocarbon having suffix -yne in the name, indicates the presence of a triple bond between carbon-carbon atoms.

Answer 2

Hello there.

The answer is C. There is a triple carbon-bond in the molecule.

Have a nice day!
~Ruru