A nitrite solution is added to a saturated solution of iron `(II)` acidified with dilute acetic acid or with dilute sulphuric acid.If any reactions occurs then write the name and chemical composition of the product formed.Write also the chemical equations involved.

Explanation

`NO_(2)^(-) +CH_(3)CO OH to HNO_(2)+CH_(3)CO O^(-)`
`3 HNO_(2) to H_(2)O +HNO_(3)+ 2 NO uarr`
`NO uarr + Fe^(2+) +SO_(4)^(2-) to [FeNO]SO_(4)` (Nitroso ferrous sulphate)