Identify the type of hydrogen bonding in the following substances: Ice,Water,Liquid Ammonia,$o$-Nitrophenol,$p$-Nitrophenol.

The molecular interactions responsible for hydrogen bonding in $HF$ are:

Select the compound from the following which dissolves in water.

When two ice cubes are pressed over each other,they unite to form one block. Which of the following forces is responsible for holding them together?

Hydrogen bonding is maximum in

The boiling points of methanol,water,and dimethyl ether are respectively $65\,^{\circ}C$,$100\,^{\circ}C$,and $-24.8\,^{\circ}C$ (note: dimethyl ether is a gas at room temperature). Which of the following best explains these wide variations in boiling point $(b.p.)$?