Ncert Exercises & Solutions

Given below are two statements:

Assertion (A):	N₂ is less reactive than P₄.
Reason (R):	Nitrogen has more electron gain enthalpy than phosphorus.

1.	Both (A) and (R) are true and (R) is the correct explanation of (A).
2.	Both (A) and (R) are true but (R) is not the correct explanation of (A).
3.	(A) is true but (R) is false.
4.	(A) is false but (R) is true.

Hint: N₂ has a triple bond and P₄ has a single bond

N₂ is less reactive than P₄ due to the high value of bond dissociation energy which is due to the presence of a triple bond

between two N-atoms of N₂molecule. But in P₄ only a single bond is present.

Hence, Assertion is correct, but Reason is the wrong statement.