MCQ
During change of $O_2$ to $O_2^-$  ion, the electron adds on which one of the following orbitals
  • ${\sigma ^ * }$ orbital
  • B
    ${\sigma}$ orbital
  • C
    ${\pi ^ * }$ orbital
  • D
    ${\pi}$ orbital

Answer

Correct option: A.
${\sigma ^ * }$ orbital
a
$O_2$ to $O_2^-$ $el^-$ enters in $\pi _{2px}^ *  = \pi _{2py}^ * $ $O_2\,\to\,O_2^-$ $el^-$ is entered in $ABMO$ orbital

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