Question

Choose the bond below that is most polar.

A) C-C
B) O-O
C) N-H
D) Cl-Cl

Answer 1

The most polar bond among the options provided (C-C, O-O, N-H, Cl-Cl) is the N-H bond because nitrogen is more electronegative than hydrogen, leading to a definitely polar covalent bond.

Step-by-step explanation:

To determine which bond is most polar, we look at the difference in electronegativity between the two atoms involved in the bond. A bond is considered polar when there is a significant difference in electronegativity between the atoms, leading to an uneven distribution of electron density.

The bonds given are:

• C-C
• O-O
• N-H
• Cl-Cl

Bonds between identical atoms, as in C-C, O-O, and Cl-Cl, are nonpolar covalent because the electrons are shared equally. In contrast, in a bond like N-H, the nitrogen atom is more electronegative than hydrogen, leading to a bond that is definitely polar covalent.

Therefore, the most polar bond among the options given is option C) N-H, because of the significant difference in electronegativity between nitrogen and hydrogen.