In which of the following compounds is intramolecular hydrogen bonding present?

Intramolecular hydrogen bonding is not present in

Explain why,in spite of having nearly the same electronegativity,oxygen forms hydrogen bonding while chlorine does not.

Which one of the following does not have intermolecular hydrogen bonding?

The steam volatile compounds among the following are $:$
$(A)$ $o$-nitrophenol
$(B)$ $o$-nitroaniline
$(C)$ $p$-aminophenol
$(D)$ $p$-hydroquinone
Choose the correct answer from the options given below $:$

The correct order of volatility is: