a mixture of common salt, sulphur, sand and iron filings is shaken with carbon disulphide and filtered through a filter paper. the filtrate is evaporated to dryness in a china dish. what will be left in the dish after evaporation?

After evaporation, sulphur will be left in the china dish.

Why sulphur is left

• In the mixture, sulphur, common salt, sand and iron filings are present.

• Carbon disulphide is an organic solvent in which sulphur is soluble, but common salt, sand and iron filings are not.

• When the mixture is shaken with carbon disulphide and filtered, the undissolved common salt, sand and iron filings stay on the filter paper, while sulphur goes into the filtrate.

• On evaporating the filtrate in the china dish, volatile carbon disulphide escapes, leaving solid sulphur behind.

So, the solid remaining in the china dish after evaporation is sulphur.