Question

Those compounds which has electro negativity higher than 1.7 but still they have covalent bond ?

Answer 1

Explanation:

The greater the electronegativity difference, the more ionic is the bonding. Covalent Bonding happens between atoms with an electronegativity difference of 1.7 or less. That is the bond has an ionic character of 50% or less.

Answer 2

Answer: Ionic bond

Explanation:

As far as I know, if the difference in electronegativity is greater than 1.7, the character of the bond will be ionic. I don't think any compound has electronegativity higher than 1.7 but still has a covalent bond.