Medium MCQ +4 / -1 PYQ · JEE Mains 2021

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A : Dipole-dipole interactions are the only non-covalent interactions, resulting in hydrogen bond formation.

Reason R : Fluorine is the most electronegative element and hydrogen bonds in HF are symmetrical.

In the light of the above statements, choose the most appropriate answer from the options given below :

  1. A Both A and R are true and R is the correct explanation of A
  2. B A is true but R is false
  3. C A is false but R is true Correct answer
  4. D Both A and R are true but R is NOT the correct explanation of A

Solution

Dipole - Dipole are not only the interaction responsible for hydrogen bond formation. Ion-dipole can also be responsible for hydrogen bond formation. <br><br> F is most electronegative element and anhydrous HF in solid phase has symmetrical hydrogen bonding.

About this question

Subject: Chemistry · Chapter: Chemical Bonding and Molecular Structure · Topic: Ionic and Covalent Bonding

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