Question

Take sulphur powder in a china dish. Mix iron granules in it and heat. What do you see?

Answer 1

Hint:When sulphur is heated with iron filings , iron sulphide is formed . Sulphur inside the test tube starts to melt and change its colour .

Complete step-by-step answer:The sulphur powder is taken in a test tube . Some granules of iron are added to it . We have to keep in mind that the sulphur and iron are physically separable here. The mixture is then heated first in a light flame and then the flame is increased . On heating the reaction mixture , the sulphur and iron combine exothermically to form iron (II) sulphide . Some of the sulphur condenses inside the test tube.
We will see the sulphur start to melt at high temperature and the yellow colour of the sulphur starts to change to brown colour . The change in colour emphasizes the formation of the new product . That product is iron (II) sulphide.
We have observed the above changes that happen when sulphur and iron are heated together .

Note:While performing the test we will have to take necessary precautions . Iron sulphides are black and insoluble in water .