Which one of the following pairs of species have the same bond order ?
$O_2, NO^+$
$CN^-, CO$
$N_2, O_{2}^-$
$CO, NO$
Bond order of $C_2$ vapour is :
Correct decreasing order of bond order of oxygen species in $I$ to $IV$
$(I)$ $Na_2O_2$
$(II)$ $O_2 [AsF_6]$
$(III)$ $CsO_2$
$(IV)$ $O_2$
Which of the following molecules/ions does not contain unpaired electrons?
Which of the following is paramagnetic ?
Which of the configuration is correct :-