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A teacher gave an impure sample of alum containing fine sand as impurity to a student. He asked him to recover pure alum from this sample. The correct procedure to be followed would be to :(1) dissolve the impure sample of alum in water, filter and evaporate the filtrate(2) dissolve the impure sample of alum in alcohol and filter(3) move a magnet over the impure sample of alum(4) dissolve the impure sample of alum in carbon disulphide, filter and evaporate the filtrate

Answer» A teacher gave an impure sample of alum containing fine sand as impurity to a student. He asked him to recover pure alum from this sample. The correct procedure to be followed would be to :

(1) dissolve the impure sample of alum in water, filter and evaporate the filtrate

(2) dissolve the impure sample of alum in alcohol and filter

(3) move a magnet over the impure sample of alum

(4) dissolve the impure sample of alum in carbon disulphide, filter and evaporate the filtrate


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