Chemistry - Salt Analysis Question with Solution | TestHub

Fe³⁺ ions are strong oxidizing agents and react with H₂S to form Fe²⁺ along with sulphur (white turbidity), so option A is correct.

In presence of (NH₄)₂S, Fe³⁺ gets reduced and forms FeS (black ppt) along with sulphur, hence B is correct.

Similarly, with Na₂S, Fe³⁺ again produces FeS (black ppt) and sulphur due to partial reduction, so C seems possible but not fully correct reaction-wise.

Actually Fe³⁺ with sulphide ions mainly gives Fe₂S₃ (black ppt), which is unstable and hydrolyses.

Option D correctly shows Fe₂S₃ formation, so it is correct.

Thus correct reactions are those showing reduction + sulphide formation properly.

Therefore, correct options = A, B and D.