Question

1.write the physical quantities
b] . pressure
a] density
2. with the help of a labelled diagram explain a method to separate a mixture of ammonium chloride and sodium chloride .

Answer 1

1.
b] Pressure is the force per unit area applied in a direction
perpendicular to the surface of an object.
a] The density of a material is
defined as its mass per unit volume.
2.
Sodium chloride and ammonium
chloride can be separated by sublimation. (Ammonium chloride appears to sublime
upon heating).