Firstly we calculate DU (Degree of unsaturation) of given molecular formula as :-
DU=(C+1)−(2H+X−N)
for C6H14
DU=(6+1)−(214)=0
∴ possibility is for alkanes only.



(PCC stands for parent carbon chain)
∴ Total structural isomers of C6H14 are 5.

JEE Main 2015 — Chemistry Organic Chemistry
The number of structural isomers for C6H14 is:
Held on 11 Apr 2015 · Verified 6 Jul 2026.
4
5
6
3
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