Question

Magnetic separation cannot be used to separate mixture of copper n sulphur

Answer 1

Copper and sulphur are not magnetic in nature hence cannot be separated by the magnetic separation.

Answer 2

as copper n sulphur doesn't have any magnetc properties it cannot be seperated by magnetic seperation ....only when one of two meterials have magnetic property ...both can be seperated by magnetic seperation 
so your answer is no