Out of the following resonating strictures for `CO_(2)` molecule, which are important for describing the bonding in the molecule and why ? `overset(* *)(":"O)=underset((I))C=overset(* *)(O":")" "overset(+)underset(* *)(O)=underset((II))C-underset(* *)overset(* *)(O":")^(-)" "underset(* *)overset(* *)(":"O)^(-)=underset((III))C-underset(* *)overset(+)(O)" "underset(* *)overset(* *)(":"O)^(-)-underset((IV))C^(2+)-underset(* *)overset(* *)(O":")^(-)`

Explanation

Out of the structures listed above, the structure (III) is wrong since the number of electron pairs on oxygen atoms are not permissible. Similarly, the structure (II) has very little contribution towards the hybrid because one of the oxygen atome (electronegative) is shown to have positive charge. Carbon dioxide is best represented by structures (I) and (IV).