Question

(d) During ring test at the time of identification of
HNO,, why newly prepared Feso, is taken?

answer fast​

Answer 1

Answer:

Freshly prepared ferrous sulphate is used in brown ring test, because if FeSO4 is stored or it is the old one then it reacts with atmospheric oxygen and gets oxidized to form a corrosive brown-yellow coating of basic ferric sulphate, which is an adduct of ferric oxide and ferric sulphate.