Assertion : Nitrogen is less reactive than molecular oxygen.
Reason: Bond length of `N_(2)` is shorter than that of oxygen.

Options

A. if both Assertion and Reason are true and reason is the correct explanation of the assertion.
B. if both assertion and reason are true but reason is not the correct expalanation of the assertion
C. if assertion is true, reason is false
D. both assertion and reason are false statements.

Answer

a

Explanation

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)` less reactive than `O_(2)`. Higher the bond order, shorter is the bond length. Shorter bond length of `N_(2)` shows its higher bond order.