Hydrogen bonding is maximum in

The correct order of boiling point in the following compounds is

The boiling point of $CH_3OH$ (methanol) is greater than that of $CH_3SH$ (methyl thiol) because

When two ice cubes are pressed together,they join to form a single cube. Which of the following forces is responsible for holding them together?

Consider the following statements:
$I.$ In gaseous phase,the vapour pressure of $CH_3COOH$ is less than expected.
$II.$ In benzene,acetic acid dimerises.
$III.$ $CH_3OH$ is more viscous than $H_2O$.
$IV.$ $CH_3OCH_3$ is non-polar but soluble in water.
Select the correct set of codes using $T$ for true and $F$ for false statements in the given sequence.

The boiling point of $NH_3$ is much higher than that of $PH_3$ because.......