Bond Parameters - Bond Length

Which of the following statements are correct about \[\ce{CO^{2-}3}\]?

(i) The hybridisation of central atom is sp³.

(ii) Its resonance structure has one \[\ce{C - O}\] single bond and two \[\ce{C = O}\] double bonds.

(iii) The average formal charge on each oxygen atom is 0.67 units.

(iv) All \[\ce{C - O}\] bond lengths are equal.

Define the bond length.

Describe hybridisation in the case of \[\ce{PCl5}\] and \[\ce{SF6}\]. The axial bonds are longer as compared to equatorial bonds in \[\ce{PCl5}\] whereas in \[\ce{SF6}\] both axial bonds and equatorial bonds have the same bond length. Explain.

In a covalent bond, ______ the bond length ______ is the energy required to break the bond.

All the \[\ce{C - O}\] bonds in carbonate ion \[\ce{(CO^{2-}3)}\] are equal in length. Explain.

In which of the following molecule/ion all the bonds are not equal?