Q.

The difference in energy between the actual structure and the lowest energy resonance structure for the given compound is             [2024]

1 electromeric energy  
2 ionization energy  
3 hyperconjugation energy  
4 resonance energy  

Ans.

(4) 

Resonance energy is defined as the difference in energy between the actual structure (real hybrid) and the lowest energy resonance structure for the given compound.