Question

Which of the following molecules or ions contain polar bonds?

(a) O₃
(b) S₈
(c) O₂²⁻
(d) NO₃⁻
(e) CO₂
(f) H₂S
(g) BH₄⁻

Answer 1

The molecules or ions that contain polar bonds are NO₃⁻, H₂S, and BH₄⁻.

Step-by-step explanation:

Polar bonds occur when there is an unequal sharing of electrons between two atoms in a molecule. This happens when one atom has a higher electronegativity than the other. Based on the given options, the molecules or ions that contain polar bonds are:

• (d) NO₃⁻: The nitrogen atom has a higher electronegativity than the oxygen atoms, resulting in a polar bond.
• (f) H₂S: The sulfur atom has a higher electronegativity than the hydrogen atoms, resulting in a polar bond.
• (g) BH₄⁻: The boron atom has a higher electronegativity than the hydrogen atoms, resulting in a polar bond.