Chemistry - GOC Question with Solution | TestHub
ChemistryGOCRESONANCE AND MESOMERIC EFFECTMedium2 minQB
ChemistryMediumsingle choice
How many of the following five molecules contain a conjugated system ?
(1) 
(2) 
(3) 
(4) 
(5) 
Options:
Answer:
A
Solution:
Only (1) has alternating double and single bonds (CH₂=C-CH=C), which make a conjugated diene.
In (2) the C=C and the C≡C are separated by two sp³ carbons. In (3), (4) and (5) each ring has a single isolated C=C.
Stream:JEESubject:ChemistryTopic:GOCSubtopic:RESONANCE AND MESOMERIC EFFECT
⏱ 2mℹ️ Source: QB
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