Assertion He2 does not exist. Reason Bond order of He2 is zero.

Question

Assertion He2 does not exist. Reason Bond order of He2 is zero. (A) Both Assertion and Reason are true and Reason is the correct explanation of Assertion. (B) Both Assertion and Reason are true but Reason is not the correct explanation of Assertion. (C) Assertion is true but Reason is false. (D) Both Assertion and Reasonlare false.

Tardigrade Admin · Accepted Answer

He2 does not exist because bond order of He2+ is zero.Molecular orbital configuration of He2=σ 1s2, σ* 1s2 =(Nb-Na/2) =(2-2/2)=0

Q. Assertion $H e_{2}$ does not exist.
Reason Bond order of $H e_{2}$ is zero.

Both Assertion and Reason are true and Reason is the correct explanation of Assertion.

Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.

Assertion is true but Reason is false.

Both Assertion and Reasonlare false.

$H e_{2}$ does not exist because bond order of $H e_{2}^{+}$ is zero.Molecular orbital configuration of $H e_{2} = σ 1 s^{2}, σ^{*} 1 s^{2}$
$= \frac{N _{b} - N _{a}}{2}$
$= \frac{2 - 2}{2} = 0$

Q. Assertion He2​ does not exist. Reason Bond order of He2​ is zero.