Question

an aqua solution of ferrous sulphate reacts with aqueous solution of sodium hydroxide to form precipitate of ferrous Hydroxide and sodium sulphate oxide

Answer 1

The following reaction can be termed as a double displacement reaction. Here Na(sodium) being highly reactive displaces FeSO4 from its solution. Thus, a dull green precipitate is obtained as follows:

NaOH + FeSO4 => Na2SO4 + Fe(OH)2

Hope this helps :)

Answer 2

NaOH + FeSO4 ----> Na2SO4 + Fe(OH)2