Maharashtra State PSC Model Paper 4

The correct answer is Nitrogen.

• Nitrogen is an unreactive gas.

• Nitrogen is unreactive because it has a strong triple bond which binds the two nitrogen atoms together and thus makes it harder to be broken.
• Nitrogen does not burn, and at ordinary temperatures, it does not react with other elements.
• Nitrogen:
  • Atomic number: 7
  • Atomic mass: 14 u
  • 78% by volume in the atmosphere
  • Liquid nitrogen is used for refrigeration.
  • Ammonia is an important compound of N₂ which is prepared by Haber’s process.