Chemistry - GOC Question with Solution | TestHub
ChemistryGOCRESONANCE AND MESOMERIC EFFECTEasy2 minQB
ChemistryEasysingle choice
Which of the following pairs of structures do not represent resonance forms ?
(A) 
and 
(B) 
and 
(C) 
and 
(D) and 
Options:
Answer:
A
Solution:
In (A) the first structure has a four-membered ring and the second has none (two exocyclic CH₂). The sigma framework is different, so they are isomers.
(B), (C) and (D) differ only in the position of electrons : enolate and phenoxide resonance.
Stream:JEESubject:ChemistryTopic:GOCSubtopic:RESONANCE AND MESOMERIC EFFECT
⏱ 2mℹ️ Source: QB
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