JEE Main 2021ChemistryChemical Bonding and Molecular StructureMediumMCQ

JEE Main 2021 — Chemical Bonding and Molecular Structure Question with Solution

JEE Main 2021 (26 Feb Shift 1)

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:

Choose an option

Show full solutionCorrect option: A
Correct answer
AA is false but R is true

Step-by-step explanation

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

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About this question

This is a previous-year question from JEE Main 2021, covering the Chemical Bonding and Molecular Structure chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.