The type of bonding in $HCl$ molecule is

The correct order of bond length is:

The potential energy $(y)$ curve for $H_2$ formation as a function of internuclear distance $(x)$ of the $H$ atoms is shown below.
The bond energy of $H_2$ is

The hydrogen chloride molecule contains a

Which one of the following compounds is hypervalent?

$A$ covalent bond between two atoms is formed by which of the following?