Question

The electronegativity of $O,F,N,Cl$ and $H$ are $3.5,4.0,3.0,3.0$ and $2.1$ respectively. The strongest bond will be

• A. F-O
• B. O-Cl
• C. N-H
• D. O-H

Answer 1

Correct option: (C)

• Bond strength is directly proportional to the difference in electronegativity of atoms.
• For $O-H$ bond, the electronegativity difference is maximum.
• Electronegativity of $O-H$ bond $3.5-2.1=1.4$

Hence, the correct option is (C).