The hydrogen bond is strongest in

Select the compound from the following that will show intramolecular hydrogen bonding.

Which one of the following is the correct decreasing order of boiling point?

The compound/s which will show significant intermolecular $H$-bonding is/are :
$(a)$ $o$-Nitrophenol
$(b)$ $N$-($4$-hydroxyphenyl)acetamide
$(c)$ $2,6$-di-tert-butylphenol

The vapour pressure of $o-$nitrophenol at any given temperature is predicted to be

$H_2O$ is a liquid while $H_2S$ is a gas due to: