Which of the following statements is incorrect?

Bond length is the length between the nuclei of two bonded atoms in a molecule. 

We know that two or more atoms combine to form a molecule. The distance between two nuclei of bonded atoms is the bond length. 

When the size of the bonded atoms increases, the distance between the nuclei increases, and the intermolecular force of attraction decreases. 

The bond strength decreases as it becomes easier to break the bond. 

So, option D) as the size of bonded atoms increases bond strength increases is correct.