a mixture
No, the mixture of powdered sulfur and iron filling are not a homogenous mixture, they are a heterogenous mixture.
By the process of diffusion.....
Solutions are a type of mixture, so it's not really an either/or thing. However, in order to be considered a solution, the mixture must be homogenous, and a mixture of sulfur and iron filings is decidedly not homogeneous on a microscopic level. So it's (just) a mixture, not the specific type of mixture called a solution.
Heterogeneous
Reacting iron with sulfur an iron sulfide is formed, not a mixture.
a magnet
wiggily?
Sulfur is an element.
No, it is a mixture, as they are not liquids.
iron sulfide, FeS or Fe3S2
It is a chemical reaction
wiggily?