Question

For isomeric alkyl halides, the boiling point decreases with branching. This is due to:

• A. Increase in the surface area
• B. Decrease in the surface area
  
• C. Molecular mass decreases
  
• D. Molecular mass increases

Answer 1

The correct option is B Decrease in the surface area


Boiling point of isomeric​ haloalkanes decreases with increase in branching because surface area of molecule decreases due to which intermolecular forces of attraction decrease​ and hence boiling point decreases.
Boiling point of $(C{H}_3{)}_{3}CCl$ is less than $(C{H}_3{)}_{2}CHC{H}_{2}Cl$ as former is more branched.