MHT CET Chemistry Question (2026) — Solution

Step-by-step solution

The boiling point of a compound depends on the strength of its intermolecular forces. Molecules containing - OH groups can form intermolecular hydrogen bonds, which are significantly stronger than the dipole-dipole interactions and London dispersion forces present in alkyl halides. Therefore, alcohols generally have higher boiling points than alkyl halides of comparable molecular mass. Among the given options: CH _3 - CH _2 - Br and CH _3 - CH _2 - CH _2 - Br are alkyl halides and do not exhibit hydrogen bonding. CH _3 - C ( CH _3)( Cl ) - OH has one - OH group, allowing for intermolecular hydrogen bonding. CH _3 - CH ( OH ) - CH _2 - CH _2 - OH (a diol) contains two - OH groups per molecule. This allows for a more extensive network of intermolecular hydrogen bonds compared to a monohydric alcohol. Due to the presence of two hydroxyl groups and the resulting extensive intermolecular hydrogen bonding, CH _3 - CH ( OH ) - CH _2 - CH _2 - OH has the maximum boiling point. Answer: CH _3 - CH ( OH ) - CH _2 - CH _2 - OH