A) A and R both are correct and R is me correct explanation of A.
B) A and R both are correct but R is not the correct explanation of A.
C) A is incorrect but R is correct.
D) Both A and R are incorrect.
Correct Answer: A
Solution :
\[H{{e}_{2}}\]does not exists because bond order of\[H{{e}_{2}}\]is zero. Molecular orbital configuration of \[H{{e}_{2}}=\sigma 1{{s}^{2}},{{\sigma }^{*}}1{{s}^{2}}\] Bond order \[=\frac{{{N}_{b}}-{{N}_{a}}}{2}=\frac{2-2}{2}\] \[\therefore \]Bond order = zero
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