Which compound has the lowest boiling point?

Question

A. CH3CH2CH(CH3)CH3

B. (CH3)4C

C. CH3CH2CH2CH2CH3

D. CH3CH2OCH2CH3

Answer 1

The answer is B) (CH3)4C, which is neopentane. The general rules about the boiling points of alkanes is that the lower the molecular weight and the more branching a hydrocarbon has, the lower it's boiling point will be. Neopentane is a fully saturated hydrocarbon (pentane) with 4 branches (methyl groups). It, therefore, will have the lowest boiling point.

Hope this helps!!!

Answer 2

B. (CH3)4C

If it has a double or triple bond, that one.

If not, this one

C. CH3CH2CH2CH2CH3