Question

A student mixed a small amount of iron filings and sulphur powder in a dish. He could not affect the separation by simple hand-picking. Which liquid will
you suggest to affect the separation?
(a) Carbon disulphide
(b) Cold water
(c) Boiling water
(d) Kerosene​

Answer 1

Carbon-di-sulphide solution is suggested to affect the separation of iron filings and sulphur powder.

Explanation:

• In order to separate the sulphur and iron filings, the solvent carbon-di-sulphide has been used, which is further followed by filtration and evaporation.  
• This is due to the fact that sulphur dissolves in carbon-di-sulphide forming a colloidal yellow colour solution, whereas iron does not.
• Now the undissolved iron can be removed by the method of filtration.
• Now the filtrate contains sulphur, which is also carried out by the process of evaporation.
• When the mixture of sulphur powder and carbon disulphide gets completely evaporated, the sulphur powder is left over.

Answer 2

Explanation:

carbon disulphideu9su9fs8sdz58d5u*w8f