Question

question 3 of 30
what is the name of the molecule below?

h—c≡c—h

a. methyne
b. ethene
c. ethyne
d. methene

Explanation:

1. First, analyze the molecular structure \( \text{H}-\text{C}\equiv\text{C}-\text{H} \). It has 2 carbon atoms (prefix "eth-") and a triple bond (suffix "-yne" for alkynes).
2. Meth- is for 1 carbon, so options A (Methyne) and D (Methene) are incorrect. Ethene has a double bond (suffix "-ene"), so B is incorrect. Ethyne (also called acetylene) has 2 carbons with a triple bond, matching the structure.

Answer:

C. Ethyne