Arrange `NH_3,H_2O` and HF in the order of increasing magnitude of hydrogen bonding and explain the basis for your arrangement.

Explanation

(i) Increasing magnitude of hydrogen bonding among `NH_(3)`, `H_(2)O` and HF is `HF>H_(2)O>NH_(3)`
(ii) The extent of hydrogen bonding depends upon electronegativity and the number of hydrogen atoms available for bonding.
(iii) Among N, F and the increasing order of their electronegativities are N(iv) Hence the expected order of the extent of hydrogen bonding is `HF>H_(2)O>NH_(3)`.