What is the dominant intermolecular force or bond that must be overcome in converting liquid $CH_3OH$ to a gas?

In which of the following is intermolecular $H$-bonding present?

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

Intramolecular hydrogen bonding is not present in

Given below are two statements:
Statement $I$: $o$-Nitrophenol is steam volatile due to intramolecular hydrogen bonding.
Statement $II$: $o$-Nitrophenol has a high melting point due to hydrogen bonding.
In the light of the above statements,choose the most appropriate answer from the options given below:

$o-$Nitrophenol is less soluble in water than $p-$ and $m-$nitrophenols because: