Maximum unpaired electrons are present in
$O_2$
$O_2^-$
$O_2^+$
$O_2^{2-}$
In the synergic bond of metal carbonyls
The hybridizations of atomic orbitals of nitrogen in $NO_2^+, NO_3^-$ and $NH_4^+$ respectively are
In the following the correct bond order sequence is :
Which of the following pairs have identical values of bond order ?
The incorrect order of adjacent bond angle