Assertion: H2 molecule is more stable than HeH molecule. Reason: The anti-bonding electron in the molecule destabilize it.

Question

Assertion: H2 molecule is more stable than HeH molecule. Reason: The anti-bonding electron in the molecule destabilize it. (A) If both Assertion: and Reason: are true and the Reason: is the correct explanation of the Assertion (B) If both Assertion: and Reason: are true but the Reason: is not the correct explanation of the Assertion (C) If Assertion: is true but Reason: is false (D) If both Assertion: and Reason: are false

Tardigrade Admin · Accepted Answer

H 2 molecule is more stable than HeH because bond order of H2=1 and that of HeH =(1/2) (Higher the bond order, more is the stability).

Q. Assertion: $H_{2}$ molecule is more stable than $HeH$ molecule.
Reason: The anti-bonding electron in the molecule destabilize it.

If both Assertion: and Reason: are true and the Reason: is the correct explanation of the Assertion

If both Assertion: and Reason: are true but the Reason: is not the correct explanation of the Assertion

If Assertion: is true but Reason: is false

If both Assertion: and Reason: are false

$H_{2}$ molecule is more stable than HeH because bond order of $H_{2} = 1$
and that of $HeH = \frac{1}{2}$
(Higher the bond order, more is the stability).

Q. Assertion: H2​ molecule is more stable than HeH molecule. Reason: The anti-bonding electron in the molecule destabilize it.