1.

Differentiate between hydrogen bond and covalent bond.

Answer»
Hydrogen bondCovalent bond
(i) Hydrogen bond involves dipole attractions.Covalent bond in-volves sharing of electrons.
(ii) It is formed between hydrogen atom and a highly electronegative atom (F, O or N).It is formed between any two electronegative atoms which may be of the same element or of different elements.
(iii) Bond strength of hydrogen bond is very small, e.g., bond strength of H---F bond is 41.83 kJ mol−1Bond strength of covalent bond is sufficiently high. For example, bond strength of H—H bond is 433 kJ mol−1


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