Question

1. which statement is true about bond strengths in resonance structures?

a. they are stronger than single bonds but weaker than double bonds.
b. they are as strong as triple bonds.
c. they do not change compared to non-resonance structures.
d. they are weaker than single bonds.

Explanation:

To determine the correct statement about bond strengths in resonance structures, we analyze each option:

• Option a: In resonance, bonds are a hybrid (e.g., between single and double bonds in some cases). A resonance - stabilized bond has more bond order than a single bond (so stronger) but less than a double bond (so weaker). This is consistent with the nature of resonance - hybrid bonds.
• Option b: Triple bonds are much stronger than resonance - hybrid bonds (which are often between single and double bond character), so this is incorrect.
• Option c: Resonance does change bond strengths as it involves delocalization of electrons, leading to a different bond order compared to non - resonance structures. So this is incorrect.
• Option d: Resonance - stabilized bonds are stronger than single bonds (due to increased bond order from electron delocalization), so this is incorrect.

Answer:

a. They are stronger than single bonds but weaker than double bonds.