Question

tag all the carbon atoms with pi bonds in this molecule. if there are none, please check the box below. h — c ≡ c — h there are none.

Explanation:

Step1: Understand bond - type in triple - bond

A triple bond between carbon atoms consists of one sigma ($\sigma$) bond and two pi ($\pi$) bonds.

Step2: Identify carbon atoms with triple - bond

In the molecule $H - C\equiv C - H$, the two carbon atoms are connected by a triple bond.

Answer:

Tag both carbon atoms.