JEE Main20241 Feb 2024Evening ShiftChemistryGeneral Organic ChemistryActual
Which among the following has highest boiling point?
Options
- ACH 3 CH 2 CH 2 CH 3
- BCH 3 CH 2 CH 2 CH 2 - OH
- CCH 3 CH 2 CH 2 CHO
- DH 5 C 2 - O - C 2 H 5
Correct answer
B. CH 3 CH 2 CH 2 CH 2 - OH
Step-by-step solution
The boiling points of aldehydes and ketones are higher than hydrocarbons and ethers of comparable molecular masses. It is due to weak molecular association in aldehydes and ketones arising out of the dipole-dipole interactions. Also, their boiling points are lower than those of alcohols of similar molecular masses due to absence of intermolecular hydrogen bonding.