Question

Main reason for brown ring test of no3

Answer 1

to check for nitrate ion

Answer 2

A common nitrate test, known as the brown ring test can be performed by adding iron(II) sulphate to a solution of a nitrate, then slowly adding concentrated sulphuric acid such that the acid forms a layer below the aqueous solution. ... This test is sensitive up to 2.5 micrograms and a concentration of 1 in 25,000 parts.