Question

When gunpowder is shaken with carbon disulphide and then filtered the residue contains -
(A) nitre only
(B) sulphur only
(C) nitre and charcoal
(D) nitre and sulphur​

Answer 1

When carbon disulphide is added to the residue, sulphur dissolves. When this mixture is filtered the filtrate is sulphur solution while the residue is charcoal. Leaving it open evaporates the sulphur solution. Carbon disulphide then evaporates and sulphur crystals are left behind