Which one hs the lowest boiling point?

Explanation

1-Chloropentane has the highest boiling point whereas 1-chloro-2,2-dimethylpropane has the least boiling point. 1-Chloropentane is the unbranched chain isomer with strongest intermolecular forces. 1-Chloro-2,2-dimethyl propane has weakest inter molecular forces due to smallest surface area with spherical symmetry