Chemistry - Salt Analysis Question with Solution | TestHub

The Griess-Ilosvay test is a sensitive colorimetric method specifically used to detect and quantify nitrite ($N{O}_2^{-}$) ions.

The formation of the characteristic red azo dye depends heavily on controlled acidic conditions (usually pH 2.0 to 2.5).

At extremely high nitrite concentrations, the excess nitrite can oxidize the reagents or cause a hook effect, preventing proper colour development.

Therefore, the dye does not form under all conditions regardless of concentration, making statement (D) false.