Question

The vapoor density of completely dissociated nh4cl is

Answer 1

The vapour density of a substance has a direct relationship with the molecular mass.

Molecular mass = 2 × Vapour density

Fully dissociated NH4Cl exists in the form of ions.

Thus, the molecular mass of the species becomes half of the molecular mass of pure NH4Cl.

As a result, the vapour density of a fully dissociated NH4Cl is half the vapour density of pure NH4Cl.