Question

The IUPAC name of Acetylene is:

• A. Propane
• B. Propyne
• C. Ethene
• D. Ethyne

Answer 1

The correct option is D

Ethyne

Explanation for the correct answer(D):

International Union of Pure and Applied Chemistry (IUPAC) is the accepted authority for chemical nomenclature, measurements, and atomic mass values, setting the standards for atomic weights on the periodic table.

Ethyne$\left({\mathrm{C}}_2{\mathrm{H}}_2\right)$ is the IUPAC name for Acetylene where eth- is the hydrocarbon chain with two carbon atoms and 2 hydrogen atoms and '-yne' is to represent the triple bond between the carbon atoms. That is $\mathrm{H}-\mathrm{C}\equiv \mathrm{C}-\mathrm{H}$.

Explanation for the incorrect options:

A) Propane$\left({\mathrm{C}}_3{\mathrm{H}}_8\right)$ consists of $3$ carbon atoms and -ane represents a single bond.

B) Propyne$\left({\mathrm{C}}_3{\mathrm{H}}_4\right)$ consists of $3$ carbon atoms however -yne represents a triple bond.

C) Ethene$\left({\mathrm{C}}_2{\mathrm{H}}_4\right)$ consists of $2$ carbon atoms and -ene represent a double bond.

Therefore, option (D) is the correct answer. The IUPAC name of Acetylene is Ethyne.