Hydrogen bonds are formed in many compounds, e.g.,H_(2) O, HF, NH_(3). The boiling point of such compounds depends to a large 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 point of such compounds depends to a large 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 gt H_(2)O` `NH_(3)gt H_(2) O gt HF` Solution :Strength of H-bond is in the ORDER: `H………..Fgt H……….Ogt H………N.` But each `H_(2)O ` molecule is linked to4 other `H_(2)O ` moleculesthrough H-bonds WHEREAS each HF molecule is linked only to two HF molecular . HENCE .b.pt .of `H_(2)Ogtb.pt of HF`