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.

• A. Both statement I and II are correct
• B. Both statement I and II are incorrect
• C. Statement I is correct but statement II is incorrect
• D. Statement I is incorrect but statement II is correct

Hint:

- Resonance increases stability by delocalizing electrons.
- Structures with more covalent bonds are generally more stable.
- Only electrons move in resonance; nuclei remain fixed.

Answer 1

The Correct Option is D

Step 1: Understanding Resonance Stability - In resonance, structures with more covalent bonds are actually more stable due to delocalization of electrons, which reduces overall energy. - Hence, Statement I is incorrect because a greater number of covalent bonds leads to higher stability rather than lower. 

Step 2: Validating Statement II 
- The nuclei remain fixed in resonance structures; only electrons move to create delocalized bonding. 
- Therefore, Statement II is correct, as resonance does not affect the position of nuclei.

 Step 3: Verifying the Answer 
- Since Statement I is incorrect and Statement II is correct, the correct answer is Option (4).