Final answer:
The molecule that contains 1 sigma and 2 pi bonds is N₂.
Step-by-step explanation:
The molecule that contains 1 sigma (σ) and 2 pi (π) bonds is N₂. In a N₂ molecule, there is a triple bond between the two nitrogen atoms. The triple bond consists of one sigma bond and two pi bonds. The sigma bond is formed by the overlap of atomic orbitals along the internuclear axis, while the pi bonds are formed by the sideways overlap of p orbitals.