Concept:Hydrogen bonding occurs when hydrogen is covalently bonded to a highly electronegative atom like fluorine, oxygen, or nitrogen.
Explanation:In
HF, hydrogen is directly attached to fluorine, the most electronegative element.
This creates a strong dipole, allowing
HF molecules to form intermolecular hydrogen bonds.
Methane (
CH4) has no such electronegative atom bonded to hydrogen.
HBr has a less electronegative bromine, so its hydrogen bonding is weak and not significant.
H2SO4 can hydrogen bond, but the classic example asked here is hydrogen fluoride.
Answer:D.
HF