Question

Assertion . `H_(2)` molecule is more stable than HeH molecule.
Reason . The antibonding elelctron in the molecule destabilises is .
A. If both assertion and reason are correct, and reason is the correct explanation of the assertion.
B. If both assertion and reason are correct , but reason is not the correct explanation of the assertion.
C. If assertion is correct, but reason is incorrect .
D. If both assertion and reason are incorrect.

Answer 1

Correct Answer - b
Correct explanation . `H_(2)` molecular is more stable
than Heh because bond order of `H_(2)` = 1 and that
of Heh ` = (1)/(2)` (Higher the bond order , more is the stability).