Among the common mineral acids,$H_2SO_4$ is less volatile due to

How many water molecules present in $CuSO_4 \cdot 5 H_2 O$ are hydrogen bonded?

Which of the following shows hydrogen bonding?

Water $(H_2O)$ is a liquid while hydrogen sulfide $(H_2S)$ is a gas. This is due to:

Which among the following attractions is the strongest?

Assertion : Boiling point of $p$-nitrophenol is higher than that of $o$-nitrophenol.
Reason : $p$-nitrophenol has intermolecular hydrogen bond whereas $o$-nitrophenol has intramolecular hydrogen bond.