Question

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

• A. $A$ is false but $R$ is true
• B. Both $A$ and $R$ are true and $R$ is the correct explanation of $A$
• C. $A$ is true $R$ is false
• D. Both $A$ and $R$ are true but $R$ is $NOT$ the correct explanation of $A$

Answer 1

Answer: (A)

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