Question

two students A and B got the mixture of iron fillings and sulphur .A heated this mixture strongly but B kept it as such. they divided the mixture further into three parts and did the same tests . Tabulate the observations when :both added HCl to a part of their mixture, both added carbon disulphide to another mixture . ,both used magnet to separate its constituents on the last part of the mixture

Answer 1

first when A heared this mixture then it will form iron sulphide
when HCl is added to in A 's mixture (iron sulphide) then hydrogen sulphide will be evolved and when HCl is added to B's observation then only hydrogen gas will be evolved
when carbon disulphide is added to A's mixture then there will be no change but when it is added to B's mixture then sulphur will dissolved in it leaving the iron
when magnet is used then iron will not be attracted as iron sulphide now become a compound but when magnet is moved over B's mixture then iron will be attract