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JEE Main · 2023 · 08 Apr 2023 · Shift 1 · Alcohols Phenols and Ethers

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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)Both A and R are true and R is the correct explanation of A✓ Correct
  2. (B)A is true but R is false
  3. (C)Both A and R are true but R is not the correct explanation of A
  4. (D)A is false but R is true

Answer: (A)

Solution

Butan-1-ol () has an group that can form extensive intermolecular hydrogen bonds. Ethoxyethane () lacks an atom bonded to oxygen and cannot form hydrogen bonds. Hydrogen bonding leads to stronger molecular association and hence higher boiling point. Both statements are true and R correctly explains A.

JEE Main · 2023 · 08 Apr 2023 · Shift 1 · Single correct option

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