Chemistry - GOC Question with Solution | TestHub
ChemistryGOCHyper conjugationMedium2 minQB
ChemistryMediumsingle choice
Which diene has the larger heat of hydrogenation ? Compare (a) penta-1,4-diene and (b) penta-1,3-diene.
(a) 
(b) 
Options:
Answer:
D
Solution:
Penta-1,3-diene is conjugated and stabilised by resonance. Penta-1,4-diene has isolated double bonds, so it is less stable and gives out more heat : a b.
Stream:JEESubject:ChemistryTopic:GOCSubtopic:Hyper conjugation
⏱ 2mℹ️ Source: QB
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