Among the species : $C{O_2},C{H_3}CO{O^ - },$ $CO,C{O_3}^{2 - },$ $HCHO$ which has the weakest carbon- oxygen bond
$C{O_2}$
$C{H_3}CO{O^ - }$
$CO$
$C{O_3}^{2 - }$
In which case the bond length is minimum between carbon and nitrogen
${{\rm{H}}_3}{\rm{P}}{{\rm{O}}_3}$ can be represented by structure $1$ and $2$ shown below. Can these two structures be taken as the canonical forms of the resonance hybrid representing ${{\rm{H}}_3}{\rm{P}}{{\rm{O}}_3}$ ? If not, give reasons for the same.
In the cyanide ion, the formal negative charge is on
In benzene molecule all $C - C$ bond lengths are equal because
Choose the $CORRECT$ comparison of decreasing $\pi -$ bond order of $S-O$ bond ?