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4. Chemical bonding and molecular structure — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry4. Chemical bonding and molecular structure1 Mark
MCQ
Which amongst the following is incorrect statement?
  • A
    $C _{2}$ molecule has four electrons in its two degenerate $\pi$ molecular orbitals.
  • B
    $H _{2}^{+}$ion has one electron.
  • ✓
    $O _{2}^{+}$ion is diamagnetic.
  • D
    The bond orders of $O _{2}^{+}, O _{2}, O _{2}^{-}$and $O _{2}^{2-}$ are $2.5, 2, 1.5$ and $1,$ respectively.
✓

Answer

Correct option: C.
$O _{2}^{+}$ion is diamagnetic.
c
$O _{2}^{+}$ion is having $15$ electrons, so it contain one unpaired electron. Hence it is paramagnetic in nature.

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