Chemistry - GOC Question with Solution | TestHub
ChemistryGOCRESONANCE AND MESOMERIC EFFECTHard2 minQB
ChemistryHardsingle choice
Which of the following pairs are resonance contributors ?
(A) 
and 
(B) 
and 
(C) 
and 
Options:
Answer:
B
Solution:
(A) is a keto-enol pair. A hydrogen has moved, so they are tautomers.
(B) differs only in the position of the pi electrons and the negative charge (allyl anion). Resonance contributors.
(C) The second cation is not reached from the first by moving only electrons (a homoallyl cation, with a different arrangement of the atoms).
Only (B).
Stream:JEESubject:ChemistryTopic:GOCSubtopic:RESONANCE AND MESOMERIC EFFECT
⏱ 2mℹ️ Source: QB
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