Question

What is observed when a mixture of iron filings and sulphur is heated in a hard glass boiling tube?

Answer 1

Answer:

When we heated a mixture of iron filings and sulphur in a hard glass a new compound is formed called iron sulphide after the reaction.

This iron sulphide is black in colour.

Chemical equation :

$$\begin{gathered} \mathrm{Fe}\left(\mathrm{s}\right)+\mathrm{S}\left(\mathrm{s}\right)\stackrel{\mathrm{Heat}}{\to }\mathrm{FeS}\left(\mathrm{s}\right) \\ \mathrm{Iron}\mathrm{Sulphur}\mathrm{Iron} \\ \mathrm{sulphide} \end{gathered}$$

Conclusion:

So, When we heated a mixture of iron filings and sulphur in a hard glass a new compound is formed called iron sulphide which is black in colour.