Problem

The key here is recognizing that $\text{N}_2$ is the most stable form of nitrogen—very unreactive and hard to make. You need to identify which compound is unstable enough that heating breaks it apart specifically into $\text{N}_2$ gas, rather than other nitrogen products. Look for compounds where nitrogen is in an unusual oxidation state or where the structure is strained, making decomposition favorable.

The key here is recognizing that $\text{N}_2$ is the most stable form of nitrogen—very unreactive and hard to make. You need to identify which compound is unstable enough that heating breaks it apart specifically into $\text{N}_2$ gas, rather than other nitrogen products. Look for compounds where nitrogen is in an unusual oxidation state or where the structure is strained, making decomposition favorable.