NEET2007ChemistryChemical Bonding and Molecular StructureActual
Assertion : Molecular nitrogen is less reactive than molecular oxygen. Reason : The bond length of ( N ₂ ) is shorter than that of oxygen.
Options
- AIf both assertion and reason are true and reason is the correct explanation of assertion.
- BIf both assertion and reason are true but reason is not the correct explanation of assertion.
- CIf assertion is true but reason is false.
- DIf both assertion and reason are false.
Correct answer
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
Step-by-step solution
Bond order of ( N ₂=3 ), bond order of ( O ₂=2 ). Higher the bond order, higher is the bond dissociation energy i.e. higher stability or less reactivity. Thus ( N ₂ ) is less reactive than ( O ₂ ). Higher the bond order, shorter is the bond length. Higher bond order of ( N ₂ ) shows its shorter bond length.