The number of possible resonance structures for $CO_3^{2 - }$is
$2$
$3$
$6$
$9$
Write the resonance structure for ${\rm{S}}{{\rm{O}}_3},{\rm{N}}{{\rm{O}}_2}$, and ${\rm{NO}}_3^-$.
In $PO_4^{3 - }$ ion, the formal charge on each oxygen atom and $P - O$ bond order respectively are
Which of the following molecule has weakest $(p \pi - d \pi)$ back bonding ?
Which of the following conditions is not correct for resonating structures?
Bond length of ethane $(I),$ ethene $(II),$ acetylene $(III)$ and benzene $(IV)$ follows the order