Ncert Exercises & Solutions

Given below are two statements:

Assertion (A):	Among the two O-H bonds in H₂O molecule, the energy required to break the first O-H bond and the other O-H bond is the same.
Reason (R):	This is because the electronic environment around oxygen is the same even after breakage of one O-H bond.

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.	Both (A) and (R) are false.

Correct assertion The bond enthalpies of the two O-H bonds in H-O-H are not equal.

Correct reason This is because electronic environment around O is not same after breakage of one O-H bond.