Correct order of heat of combustion for following compounds is:
(P) $CH_{3} - CH = CH - CH_{2} - CH_{2} - CH_{2} - CH_{3}$
(Q) $CH_{3} - CH_{2} - CH = CH - CH_{2} - CH_{2} - CH_{3}$
(R) $CH_{2} = CH - CH_{2} - CH_{2} - CH_{2} - CH_{3}$

Question

Correct order of heat of combustion for following compounds is:

(P) $CH_{3} - CH = CH - CH_{2} - CH_{2} - CH_{2} - CH_{3}$

(Q) $CH_{3} - CH_{2} - CH = CH - CH_{2} - CH_{2} - CH_{3}$

(R) $CH_{2} = CH - CH_{2} - CH_{2} - CH_{2} - CH_{3}$

TestHub · Accepted Answer

Heat of combution ∝ No of π bond ∝ stability of alkane 1 ​ and ∝ number of carbon (P) CH 3 ​ − CH = CH − CH 2 ​ − CH 2 ​ − CH 2 ​ − CH 3 ​ 7 carbon atom 5 α H (Q) CH 3 ​ = CH − CH 2 ​ − CH 2 ​ − CH 2 ​ − CH 3 ​ 6 carbon atom (R) CH 3 ​ − CH 2 ​ − CH = CH − CH 2 ​ − CH 2 ​ − CH 3 ​ 7 carbon atom 4 α H R > P > Q ]

Chemistry - GOC Question with Solution | TestHub

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