question_answer 11)

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. (f) Oil from water. (g) Tea leaves from tea. (h) Iron pins from sand. (i) Wheat grains from husk. (j) Find mud particles suspended in water.  

Answer:

(a) Evaporation : Water will evaporate leaving behind sodium chloride. (b) Sublimation : Ammonium chloride will be collected as sublime. (c) Filtration : Pieces of metal can be separated by filtration. (d) Chromatography: Pigments (coloured components) from the extract of flower plants can be separated by chromatography. (e) Centrifugation : Butter will get separated upon centrifugation. (f) Separating funnel: Oil and water can be separated by the use of separating funnel. (g) Filtration : Upon filtration through a sieve, tea leaves will be collected on the sieve. (h) Magnetic separation : A magnet will attract iron pins and not sand particles. (i) Sieving : Wheat grains from husk can be separated with the help of sieves. (j) Sedimentation : As a result of sedimentation, mud particles will settle as precipitate. It can be separated later on by filtration.