Question

In the laboratory H2S gas is prepared by using black lumps and dil H2SO4. The black lumps are
1 FeSO4
2 MnO2
3 FeS
4 FeSO3

Answer 1

In the laboratory, H₂S gas can be prepared by reacting dilute H₂SO₄ with the dark lumps of FeS.

• The apparatus used for this process is known as Kipp's apparatus.
• The reaction is usually carried out in a hydrogen atmosphere.
• In many cases, hydrogen chloride is also used in place of sulphuric acid.