Question

Which of the following exhibit highest boiling point?

• A.
• B.
• C.
• D.

Answer 1

The correct option is B

Boiling point of alcohol and phenol are higher than that of ​hydrocarbons, ethers and halo compounds of comparable molar masses due to presence of Hydrogen bonding​.​ thus ether has lower boiling point than alcohol.
For same molecular formula, as branching in chain of alcohol increases​ surface area decreases​ due to which van der Waals force decreases​ and thus Boiling point decreases​.Therefore the order of boiling point is primary alcohol > secondary alcohol > tertiary alcohol. So overall order of boiling point is
$b>c>d>a$.
Hence, the correct option is b.