Question

N heptane 2 methyl hexane 3 methyl hexane 2,2 di methyl pentane 3,3 di methyl pentane 2,4 di methyl pentane 3 ethyl pentane 2,2,3 tri methyl butane 2,3 di methyl pentane
pls answer me i will mark as br@inlist​

Answer 1

Answer:

Boiling point ∝ Molecular weight

Boiling point ∝ Branching.

3,3-dimethylpentane, 2-methylhexane, and n-heptane all have same molecular weight but the order of branching is

3,3-dimethylpentane > 2-methylhexane > n-heptane

So, the order of boiling point is

3,3-dimethylpentane > 2-methylhexane > n-pentane

Hence, hydrocarbon with the highest boiling point is 3,3-dimethylpentane and that with the lowest boiling point is n-heptane.