Question

Addition of sodium hydroxide solution to ferrous sulphate solution produces a ______ (green/reddish brown) precipitate which is ______ (soluble/insoluble) in excess of NaOH solution.

Answer 1

Addition of sodium hydroxide solution to ferrous sulphate solution produces a green precipitate which is insoluble in excess of NaOH solution.

Explanation:

Ferrous sulphate (FeSO₄) reacts with sodium hydroxide (NaOH) to form a dirty green precipitate of ferrous hydroxide [Fe(OH)₂]. This precipitate is completely insoluble in excess NaOH solution because it lacks amphoteric properties.