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

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

Solution

Assertion is incorrect since in hydrogen bonding, Dipole-dipole interactions are noncovalent but ion-dipole interaction can also result in H-bond formation.

Reason is correct since F is most electronegative element & structure is

Symmetrical H-bonds are present

Asked in: JEE Main 2021 (26 Feb Shift 1)

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