. In which of the following mixtures the separation of the components may be done using a magnet ?
(a) a mixture of ferrous sulphide and copper sulphide
(b) a mixture of iron filings and ferrous sulphide
(c) a mixture of sulphur powder and ferrous sulphide
(d) a mixture of carbon-di-sulphide and ferrous sulphide
Option 2 is correct. Using a magnet the separation of mixture containing iron fillings and ferrous sulphide is done. Because iron fillings are attracted by a bar magnet leaving ferrous sulphide in the china dish itself.