Which of the following concepts best explains why $o$-nitrophenol is more volatile than $p$-nitrophenol?

The relatively high boiling point of $HF$ is due to

When two ice balls are pressed against each other,they unite to form one ball. Which of the following forces are responsible for holding them together?

Which among the following compounds does $NOT$ form intermolecular hydrogen bonding?

The number of hydrogen bonds formed by a water molecule at normal conditions is

Which of the following molecules are expected to exhibit intermolecular $H$-bonding?
$(I)$ Acetic acid $(II)$ $o$-nitrophenol $(III)$ $m$-nitrophenol $(IV)$ $o$-boric acid
Select the correct alternative.