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The P-Block Elements

Question
CBSEENCH12006927

Why is N2 not particularly reactive?

Solution

Nitrogen is inert molecule because in nitrogen there exist a triple bond betwwn the two nitrogen atoms.
This triple bond constituted of one sigma and two pi bonds i.e.
Px -Px overlap to form sigma bond.
Py-Py and Pz-Pz overlaps to form pi bond.
The intermolecular forces in this are weak Van der Walls forces. So, the diatomic molecules exist freely.Because of the triple bond,the bond energy is very high.The bond dissociation energy of nitrogen is 945.4 kJ/mol.Due to this high bond dissociation energy, nitrogen is apparently inactive under normal conditions.This is why nitrogen is unreactive gas.