Question

Dipole-dipole interactions $d\pi -p\pi$ bond present in:

• A. $C{O}_3^{2-}$
• B. $P{O}_4^{3-}$
• C. $N{O}_3^{-}$
• D. $N{O}_2^{-}$

Answer 1

The correct option is B $P{O}_4^{3-}$

1. $p\pi -d\pi$ bonding includes d-orbitals, if you observe the options only P belongs to 3rd period and has d-orbitals (though unoccupied in ground state)

2. Other options $C$ and $N$ belong to 2nd period and do not possess d orbitals.