Which pair of atoms has the highest electronegativity difference?

A. H - S

B. H - Cl

C. N - H

D. O - H

E. C - H

D. O - H

D. O - H

Explanation:

The electronegativity of the elements in the question is:

H (2.20), S (2.58), Cl (3.16), N (3.04), O (3.44), and C (2.55).

Since, the H atom has the lowest electronegativity (2.20) and O atom has the highest electronegativity (3.44). So, O - H pair of atoms has the highest electronegativity difference.