Which amongst the following is incorrect statement?
$C _{2}$ molecule has four electrons in its two degenerate $\pi$ molecular orbitals.
$H _{2}^{+}$ion has one electron.
$O _{2}^{+}$ion is diamagnetic.
The bond orders of $O _{2}^{+}, O _{2}, O _{2}^{-}$and $O _{2}^{2-}$ are $2.5, 2, 1.5$ and $1,$ respectively.
Which of the following is paramagnetic ?
In which of the following pairs of molecules/ions, both the species are not likely to exist?
Select incorrect statement
Among the following species$N _{2}, N _{2}^{+}, N _{2}^{-}, N _{2}{ }^{2-}, O _{2}, O _{2}{ }^{+}, O _{2}^{-}, O _{2}{ }^{2-}$ the number of species showing diamagnetism is.
Assertion :Fluorine molecule has bond order one.
Reason : The number of electrons in the antibonding molecular orbitals is two less than that in bonding molecular orbitals.