Given below are two statements : One is labelled as Assertion   A and the other is labelled as Reason…

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 :

  1. A is true but R is false
  2. Both A and R are true and R is the correct explanation of A
  3. Both A and R are true but R is not the correct explanation of A
  4. A is false but R is true

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.

Asked in: JEE Main 2023 (08 Apr Shift 1)

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