NEETChemistryChemical Bonding and Molecular Structure
Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R . Assertion A : Butan– 1 –ol has higher boiling point than ethoxyethane. Reason R : Extensive hydrogen bonding leads to stronger association of molecules. In the light of the above statements, choose the correct answer from the options given below :
Options
- AA is true but R is false
- BBoth A and R are true and R is the correct explanation of A
- CBoth A and R are true but R is not the correct explanation of A
- DA is false but R is true
Correct answer
B. Both A and R are true and R is the correct explanation of A
Step-by-step solution
Butan- 1 -ol can undergo hydrogen bonding due to the presence of an - OH group, ethoxyethane (also known as diethyl ether) can also participate in hydrogen bonding. Even though there are no hydrogen atoms directly bonded to a highly electronegative atom (like F , O , or N ) in ethoxyethane, the molecule still has polar C - O bonds that can lead to dipole-dipole interactions with other polar molecules. Owing to intermolecular hydrogen bonding in butanol, it has higher boiling point than ethoxyethane.