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A hydrogen bond is formed when an H atom is covalently bonded to:
AOnly metals
BOnly carbon
CA highly electronegative atom — F, O or N
DAny non-metal
Answer & Solution
Correct answer: C. A highly electronegative atom — F, O or N
H-bonding requires H to be attached to a *highly electronegative, small* atom — **F, O or N**. The polarised H δ⁺ then attracts the lone pair of another electronegative atom.
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