Correct option is D
- The gas that is not an inert gas is Nitrogen.
- Correct answer: (D) Nitrogen
- Inert gases, also known as noble gases, belong to Group 18 of the periodic table and include Helium, Neon, Argon, Krypton, Xenon, and Radon. These gases have a complete outer electron shell, making them chemically non-reactive under normal conditions.
- However, Nitrogen belongs to Group 15 and is not a noble gas. While it is relatively stable due to its strong triple bond (N≡N) in molecular form, it can still react under specific conditions, unlike noble gases.
