Q. The highest boiling point is expected for
A) $n$-butane
B) $iso$-octane
C) $n$-octane
D) 2,2,3,3-tetramethyl butane
Explanation
(c)
(i)Among alkanes boiling point increases with increase in molecular mass.
(ii)Among isomeric alkanes the boiling point decreases with branching due to decrease in surface area.
$n$-octane will have highest boiling point because it has highest number of carbon atoms and does not show branching.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.