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A student, by mistake, mixed sulphur powder with iron filings. The following techniques were suggested to separate the sulphur from the mixture out of which he has to choose one :A. dissolving in carbon disulphide, filtration, evaporationB. dissolving in water at room temperature and filtrationC. dissolving in hot water, filtration and evaporationD. dissolving in ice cold water and filtrationThe correct technique is :(1) (A) (2) (B) (3) (C) (4) (D)
Correct Answer: (1) (A)
Explanation: On adding carbon disulphide to a mixture containing iron filings and sulphur powder, leads to the formation of a clear yellow solution. When sulphur powder dissolves in carbon disulphide, on gentle shaking, iron fillings being insoluble settle in the bottom. These can be separated by filtration. On evaporating the solution, the powder of solid sulphur is obtained.
Updated on: 10-Oct-2022
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