State Fajan's rule regarding the partial covalent character of an Ionic bond.

Define Ionic Bond?

Which of the following is max. covalent character?

Assertion : Carbon oxygen bond length of phenol is slightly less than that in methanol. Reason : There exist a partial double bond character and carbon to which oxygen is attached in phenol is sp^2 hybridised.

The ionic bonds have partial covalent character and the covalent bonds also show some ionic character Explain the covalent character of Lithium chloride using Fajan's rule

The value of E.N of atom A and B are 1.2 and 4.0 respectively. The percentage ionic character of A-B and bond is