Which separation techniques will you apply for the
separation of the following?
(a) Sodium chloride from its solution in water.
(b) Ammonium chloride from a mixture containing sodium
chloride and ammonium chloride.
(c) Small pieces of metal in the engine oil of a car.
(d) Different pigments from an extract of flower petals.
(e) Butter from curd.
Oil from water.
Answers
Explanation:
For answering this question you should first analyse what type of mixture is given and then accordingly write the name of the process.
a. Sodium chloride from its solution in water can be separated by Evaporation.
b. Ammonium chloride from a mixture containing sodium chloride and ammonium chloride can be separated by Sublimation.
c. Filtration: Small metal pieces can be filtered by using a Suitable Filter.
d. Different pigments from an extract of flower petals : Chromatography.
e. Butter from curd can be separated by centrifugal machine or churning the curd by hand.
f. Decantation: By using separating funnel, Oil and water form separate layers which are separated by using separating funnel.
g. Tea leaves from tea: Filtration
h. Iron pins are separated from sand by the process of Magnetic Separation.
i. Wheat grains from husk : Winnowing.
j. Coagulation and decantation: Alum is added to the muddy water which makes the soil particles heavier so they settle down. The clear water is then separated by decantation.