• # question_answer 48)   Hydrogen bonds are formed in many compounds e.g.,${{H}_{2}}O,HF,N{{H}_{3}}$. The boiling point of such compoundsdepends to a large extent on the strength of hydrogen bondand the number of hydrogen bonds. The correct decreasingorder of boiling points of above compounds is: (a) $HF>{{H}_{2}}O>N{{H}_{3}}$                                                             (b) ${{H}_{2}}O>HF>N{{H}_{3}}$ (c) $N{{H}_{3}}>HF>{{H}_{2}}O$                                                             (d) $N{{H}_{3}}>{{H}_{2}}O>HF$

 Compound Boiling point ${{H}_{2}}O$ $373.0K$ $HF$ $292.4K$ $N{{H}_{3}}$ $239.6K$