Hydrogen bonds are formed in many compounds e.g., H_(2)O, HF, NH_(3). The boiling on the such compounds depends to a extent on the strength of hydrogen bond and the number of hydrogen bonds. The correct decreasing order of the boiling points of above compounds is :

Hydrogen bonds are formed in many compounds e.g., H_(2)O, HF, NH_(3).

1.	Hydrogen bonds are formed in many compounds e.g., H_(2)O, HF, NH_(3). The boiling on the such compounds depends to a extent on the strength of hydrogen bond and the number of hydrogen bonds. The correct decreasing order of the boiling points of above compounds is :
Answer» `HF GT H_(2)O gt NH_(3)` `H_(2) O gt HF gt NH_(3)` `NH_(3) gt HF lt H_(2) O ` `NH_(3) gt H_(2)O gt HF ` Solution :`H_(2) O gt HF gt NH_(3)` STRENGTH of H-bond is in the ORDER : H.....F `gt ` H ..... O `gt` H...... N `H_(2)O` molecule is joined to FOUR other `H_(2)`O molecules through H-bonds and each HF molecules is joined only to two other HF molecules. So, b.p. of`H_(2) O gt `b.p. of HF `gt` b.p. of `NH_(3)`