Question

* Name the process by which the components of
following mixtures can be separated.
(a) Powdered glass and sugar
(b) Chalk powder and iron filings
(c) Chaff and grain
(d) Salt and water​

Answer 1

Explanation:

a) FILTRATION : Glass and sugar on dissolving in water and filtering glass separates out as residue on the filter paper. Filtrate of sugar solution is heated to remove water by evaporation sugar is collected as crystals. 

b) MAGNETIC SEPERATION : With the help of a magnet iron filings can be separated leaving behind chalk powder. 

c) WINNOWING : It separates chaff lighter from heavier grains in two different heaps. 

d) EVAPORATION : This method is used to separate the components of a homogeneous solid-liquid mixture like salt from sea water. Sea water is collected in shallow beds and allowed to evaporate in the sun. When all the water is evaporated salt is left behind.