Question:
Two statements are given below
Statement I: The resonance structure with more number of covalent bonds is less stable.
Statement II: The position of nuclei does not change in resonance structures.
Two statements are given below
Statement I: The resonance structure with more number of covalent bonds is less stable.
Statement II: The position of nuclei does not change in resonance structures.
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- Resonance increases stability by delocalizing electrons.
- Structures with more covalent bonds are generally more stable.
- Only electrons move in resonance; nuclei remain fixed.
Updated On: May 4, 2026
- Both statement I and II are correct
- Both statement I and II are incorrect
- Statement I is correct but statement II is incorrect
- Statement I is incorrect but statement II is correct
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The Correct Option is D
Solution and Explanation
To analyze the given statements, we need to understand the concept of resonance and the factors affecting the stability of resonance structures.
- Understanding Resonance: Resonance structures are different representations of a molecule where the arrangement of electrons can differ but the position of nuclei remains unchanged. These structures are used to depict the delocalization of electrons in compounds.
- Factors Affecting Stability of Resonance Structures: The stability of resonance structures is determined by several factors, such as the number of covalent bonds, the charge distribution, and the presence of full octets for atoms.
- A resonance structure with a greater number of covalent bonds is typically more stable because bonds provide stability to a molecule.
- Structures with minimal charge separation tend to be more stable.
- Structures where atoms have complete octets are generally more stable.
- Explanation of Statements:
- Statement I: "The resonance structure with more number of covalent bonds is less stable." This is incorrect. More covalent bonds typically increase stability because they contribute to the delocalization of electrons and proper distribution of charge.
- Statement II: "The position of nuclei does not change in resonance structures." This is correct. In resonance structures, only the placement of electrons changes, while the atomic nuclei remain in fixed positions.
Conclusion: Based on the explanations above, Statement I is incorrect because more covalent bonds generally enhance stability. Statement II is correct since the position of nuclei does not change during resonance. Therefore, the correct answer is: Statement I is incorrect but statement II is correct.
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