The crystal lattice of ice is mostly formed by

$KF$ combines with $HF$ to form $KHF_2$. Which of the following species are present in this compound?

The correct order of boiling point in the following compounds is

Which of the following compounds does $NOT$ develop intermolecular hydrogen bonding?

The number of $H_2O$ molecules participating in hydrogen bonding in $CuSO_4 \cdot 5H_2O$ is/are

The correct statement/s about Hydrogen bonding is/are:
$A$. Hydrogen bonding exists when $H$ is covalently bonded to a highly electronegative atom.
$B$. Intermolecular $H$ bonding is present in $o$-nitrophenol.
$C$. Intramolecular $H$ bonding is present in $HF$.
$D$. The magnitude of $H$ bonding depends on the physical state of the compound.
$E$. $H$-bonding has a powerful effect on the structure and properties of compounds.
Choose the correct answer from the options given below: