The molecular electronic configuration of $H_2^ - $ ion is

  • A

    ${\left( {\sigma \,1s} \right)^2}$

  • B

    ${\left( {\sigma \,1s} \right)^2}{\left( {{\sigma ^*}1s} \right)^2}$

  • C

    ${\left( {\sigma \,1s} \right)^2}{\left( {{\sigma ^*}1s} \right)^1}$

  • D

    ${\left( {\sigma \,1s} \right)^3}$

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Column $I$ Column $II$
$(A)$ $\mathrm{B}_2$ $(p)$ Paramagnetic
$(B)$ $\mathrm{N}_2$ $(q)$ Undergoes oxidation
$(C)$ $\mathrm{O}_2^{-}$ $(r)$ Undergoes reduction
$(D)$ $\mathrm{O}_2$ $(s)$ Bond order $\geq 2$
  $(t)$ Mixing of ' $\mathrm{s}$ ' and ' $\mathrm{p}$ ' orbitals

  • [IIT 2009]