Question

Write the method of separation and the principle involved in the separation of the following mixtures :
a. Dyes of ink
b. Cream from milk
c. Cuso4 + NH4cl
d. Kerosene + water

Answer 1

a.chromatography

It is based on the principle of difference in movement of different components of a mixture through a stationary phase when a mobile phase passes through it

b.Centrifugal method

The cream is lighter than milk, when churned, it comes over milk and can be collected. Centrifugal force is the force that seems to make things shoot outward when they go round in a circle, and this causes the separation of cream from milk.

c.sublimation

As NH4Cl(Ammonium chloride) is sublimible but CuSo4 is not

d.Seperating Funnel is based on immiscibility of 2 liquids

Water and kerosene are immiscible. Water is denser than kerosene. Therefore, when we keep kerosene and water in a container, kerosene floats on water. They can be separated because they have different densities.