SSC Selection Post 2023 PYQ — Question 36

The correct answer is Option 1 i.e. Interaction between the lone-pair electrons of the electronegative atom of one molecule and the hydrogen atom of another molecule.

Explanation:

• A hydrogen bond's strength is determined by the interaction between the lone pair of electrons on an electronegative atom in one molecule and the hydrogen atom bonded to an electronegative atom in another molecule.
• The strength of this electrostatic interaction, and thus the hydrogen bond, is influenced by the electronegativity difference between the atoms involved. 
• More electronegative atoms create stronger hydrogen bonds. 
• For example, hydrogen bonds involving fluorine are stronger than those involving oxygen or nitrogen.